Construction and Building Materials最新文献_第2页

Effect of tea stalk biochar derived from pyrolysis at different temperatures on adsorption capacity of asphalt fume 不同热解温度下茶茎生物炭对沥青烟吸附能力的影响

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-05-05 DOI: 10.1016/j.conbuildmat.2025.141523

Hao Duan , Quantao Liu , Sanpeng Mao , Yanheng He , Xiaobin Han , Jianying Yu , Shi Xu

{"title":"Effect of tea stalk biochar derived from pyrolysis at different temperatures on adsorption capacity of asphalt fume","authors":"Hao Duan , Quantao Liu , Sanpeng Mao , Yanheng He , Xiaobin Han , Jianying Yu , Shi Xu","doi":"10.1016/j.conbuildmat.2025.141523","DOIUrl":"10.1016/j.conbuildmat.2025.141523","url":null,"abstract":"<div><div>Asphalt fumes released at high temperatures significantly impact human health and the natural environment. This study systematically investigated the microstructure and compositional characteristics of tea stalk biochar (TB) from pyrolysis at different temperatures (300℃, 400℃, 500℃, and 600℃) and its adsorption capacity for asphalt fumes. Scanning electron microscopy and Brunauer-Emmett-Teller analysis indicated that increasing pyrolysis temperatures enhanced the porosity and BET surface area of TB, transitioning its structure from dense and low-porosity to highly porous. Fourier-transform infrared spectroscopy and elemental analysis revealed that higher temperatures promoted biochar graphitization, reduced oxygen-containing functional groups, and increased hydrophobicity and aromaticity. Analysis of asphalt fumes demonstrated that adding 1 % TB significantly reduced asphalt fume emissions, including VOCs, H₂S, SO₂, and NOₓ. TB prepared at 500℃ (500TB) exhibited optimal adsorption, reducing VOCs by 68.6 % and H₂S by 87.5 %. GC-MS analysis further revealed that 1 % 500TB reduced aliphatic hydrocarbons, aromatic compounds, oxygen-containing compounds, and sulfur-containing compounds in asphalt VOCs by 63 %, 69 %, 67.2 %, and 63.3 %, respectively. The superior adsorption performance of 500TB was attributed to its larger surface area, diverse mesoporous structure, and high aromatic carbon content, enhancing its affinity for pollutants. Physical tests indicated that biochar enhances the thermal stability and deformation resistance of asphalt by increasing its softening point, viscosity, and penetration index, while maintaining acceptable ductility. These findings demonstrate the effectiveness of TB for mitigating asphalt fume emissions.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141523"},"PeriodicalIF":7.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Axial compression performance of honeycomb structure with diamond origami tube 金刚石折纸管蜂窝结构轴向压缩性能研究

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-05-05 DOI: 10.1016/j.conbuildmat.2025.141602

Yue Zhou, ZhuangZhuang Li, XueLin Li, Shuo Han, Zonglai Mo, Jun Li

{"title":"Axial compression performance of honeycomb structure with diamond origami tube","authors":"Yue Zhou, ZhuangZhuang Li, XueLin Li, Shuo Han, Zonglai Mo, Jun Li","doi":"10.1016/j.conbuildmat.2025.141602","DOIUrl":"10.1016/j.conbuildmat.2025.141602","url":null,"abstract":"<div><div>In order to improve the energy absorption characteristics of the honeycomb structure under axial compression, this paper combines the diamond origami tubes with the honeycomb structure, and a novel origami-based honeycomb structure with a tight arrangement and close bonding is proposed. By comparing connections of diamond polygonal origami honeycombs with different side numbers, a honeycomb structure consisting of diamond triangular origami tube (DTOT) units is established. Experiments and numerical simulations analyze its deformation mode and energy absorption properties under axial compression, and the parametric analysis is also carried out. Based on the classical folding theory, a prediction formula for the mean crushing force for DTOT honeycomb structures is obtained, and its inaccuracies are within 10 % of experiments and simulation findings. The results show that the DTOT honeycomb structure can effectively reduce the initial peak crushing force while maintaining the <em>SEA</em>, and has a good prospect for cushioning and energy absorption applications compared with conventional multicellular and honeycomb structures.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141602"},"PeriodicalIF":7.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laboratory study of the effect of coal waste filler on short- and long-term fracture properties of warm mix asphalt (WMA): Towards the production of sustainable pavements 煤矸石填料对温拌沥青（WMA）短期和长期断裂性能影响的实验室研究：面向可持续路面的生产

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-05-05 DOI: 10.1016/j.conbuildmat.2025.141476

Yuanyue Pi , Xin Wang , Yawei Zhu , Alireza Naseri , Mohammad Zarei

{"title":"Laboratory study of the effect of coal waste filler on short- and long-term fracture properties of warm mix asphalt (WMA): Towards the production of sustainable pavements","authors":"Yuanyue Pi , Xin Wang , Yawei Zhu , Alireza Naseri , Mohammad Zarei","doi":"10.1016/j.conbuildmat.2025.141476","DOIUrl":"10.1016/j.conbuildmat.2025.141476","url":null,"abstract":"<div><div>Transverse cracks (with tensile origin) and oblique cracks (with tensile + tear and tear origins) on flexible asphalt pavement (FAP) develop and propagate under time-dependent environmental conditions and long-term repeated loading. These cracks, divided into low-temperature top-down cracks (LTTDC) and intermediate-temperature top-down cracks (ITTDC), cause a decrease in the course surface quality over time. The present study aimed to introduce sustainable warm mix asphalt (WMA) mixes using an environmentally friendly additive named Fresh Jig Coal Solid Waste (FJCSW). Three mixtures containing 0 % FJCSW (WF0), 50 % FJCSW (WF50), and 100 % FJCSW (WF100) were prepared and tested using the three-point edge notched disc bend (ENDB) test. This evaluation focused on three types of cracks: transverse cracks with a tensile origin (mode I), oblique cracks with tensile+tear origins (mode I+III), and oblique cracks with a tear origin (mode III). The mixes were subjected to 0 and 1 freeze-thaw (F-T) damage. Finally, an economic and environmental analysis was conducted on the asphalt pavement thickness reduction, utilizing the resilient modulus (M<sub>r</sub>) test. The results showed that the WF50 had better short- and long-term behavior against transverse cracks with tensile origin (mode I), oblique cracks with tensile+tear origin (mode I+III), and oblique cracks with tear origin (mode III). Also, the decline in thickness owing to the boost in the M<sub>r</sub> led to economic benefits and reduced pollutants emissions such as carbon dioxide (CO<sub>2</sub>), nitrogen oxides (NO<sub>x</sub>), methane gas (CH<sub>4</sub>), volatile organic compounds (VOCs), sulfur dioxide (SO<sub>2</sub>), and particulate matter (PM10) in the various construction stages.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":""},"PeriodicalIF":7.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling and validating the time-temperature-ageing superposition principle in bitumen via molecular dynamics simulations 通过分子动力学模拟对沥青的时间-温度-老化叠加原理进行建模和验证

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-05-05 DOI: 10.1016/j.conbuildmat.2025.141609

Chonghui Wang , Hanyu Zhang , Yuqing Zhang , Lu Zhou , Gordon Airey

{"title":"Modelling and validating the time-temperature-ageing superposition principle in bitumen via molecular dynamics simulations","authors":"Chonghui Wang , Hanyu Zhang , Yuqing Zhang , Lu Zhou , Gordon Airey","doi":"10.1016/j.conbuildmat.2025.141609","DOIUrl":"10.1016/j.conbuildmat.2025.141609","url":null,"abstract":"<div><div>The durability and performance of asphalt pavements are dominantly determined by the viscoelastic properties of bitumen. Time-temperature-ageing superposition principle (TTASP) theory can effectively reflect the effects of ageing and temperature on the viscoelastic properties of bitumen. However, obtaining the parameters of TTASP experimentally is time-consuming and challenging. Accurate and rapid acquisition of the parameters of TTASP is needed. In this paper, molecular dynamics (MD) simulations are used to explore the volumetric properties of bitumen, verifying the TTASP and obtaining its parameters from a molecular computational perspective. The bitumen molecules were developed in the MD according to the proportion of the lab-measured bitumen. The TTASP parameters were derived and calibrated via fractional free volume theory, considering the model size effect influenced by the number of molecules. The degree of bitumen oxidised ageing was investigated in the MD via the carbonyl groups. The proposed method effectively verifies the rationality of Time-temperature superposition principle (TTSP) and TTASP theories at nanoscale, accurately predicting volumetric and TTASP parameters. This precise and efficient approach can be used to forecasts the viscoelastic properties and ageing behaviour of bitumen, ensuring reliable predictions consistent with experimental results.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141609"},"PeriodicalIF":7.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flexural fracture behavior of ultra-high performance concrete after high-temperature exposure 高温暴露后超高性能混凝土的弯曲断裂行为

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-05-05 DOI: 10.1016/j.conbuildmat.2025.141544

Jia He , Huayi Wang , Qingliang Yu

{"title":"Flexural fracture behavior of ultra-high performance concrete after high-temperature exposure","authors":"Jia He , Huayi Wang , Qingliang Yu","doi":"10.1016/j.conbuildmat.2025.141544","DOIUrl":"10.1016/j.conbuildmat.2025.141544","url":null,"abstract":"<div><div>Exposure to high-temperature environments can seriously affect the mechanical properties of UHPC. However, the fracture mechanism of UHPC after high-temperature exposure remains unclear. This study aims to understand the fracture performance of ultra-high performance concrete (UHPC) upon high-temperature damage. UHPC was designed with different volume ratios of steel fibers (SF) and tested under temperatures 200, 400, 600, and 800 ℃, respectively. Three-point bending tests were conducted with pre-cracked beams to investigate the bending and fracture properties of UHPC. The results show that the compressive strength and flexural strength of UHPC after high-temperature present a trend of first increasing and then decreasing with the increase in temperature, and high temperature reshapes the original development trajectory of the third stage <span><math><mrow><mi>P</mi><mo>−</mo><mi>δ</mi></mrow></math></span> and <span><math><mrow><mi>P</mi><mo>−</mo><mi>C</mi><mi>M</mi><mi>O</mi><mi>D</mi></mrow></math></span> curves. High temperature reduces the bending toughness, double K fracture toughness, and fracture energy of UHPC, causing the original strengthening stage of UHPC to suddenly transform into a failure stage, resulting in brittle failure characteristics of UHPC—moreover, a prediction model for the fracture performance of UHPC after high temperature is proposed and validated.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141544"},"PeriodicalIF":7.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recycled semi-flexible pavement materials: Performance evaluation and applications incorporating reclaimed asphalt pavement 再生半柔性路面材料：结合再生沥青路面的性能评价与应用

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-05-05 DOI: 10.1016/j.conbuildmat.2025.141591

Mingyu Zhao , Baoshuang Zhu , Qingjun Ding , Qing Wang , Min Dai , Yanfeng Fang

{"title":"Recycled semi-flexible pavement materials: Performance evaluation and applications incorporating reclaimed asphalt pavement","authors":"Mingyu Zhao , Baoshuang Zhu , Qingjun Ding , Qing Wang , Min Dai , Yanfeng Fang","doi":"10.1016/j.conbuildmat.2025.141591","DOIUrl":"10.1016/j.conbuildmat.2025.141591","url":null,"abstract":"<div><div>A preparation method for recycled semi-flexible pavement (RSFP) materials was proposed to improve recycled pavement performance and diversify reclaimed asphalt pavement (RAP) recycling approaches. This study investigated the high-temperature performance, low-temperature performance, water stability, secondary aging resistance, fatigue performance, and engineering applications of RSFP materials. Experimental results show that RSFP materials possess better high-temperature stability and secondary aging resistance than conventional recycled pavement materials. RSFP material performance is directly affected by the asphalt skeleton’s air voids and the cementitious grouting material’s filling rate. A denser and thicker internal cement skeleton enhances high-temperature stability, while a thinner and less continuous structure improves resistance to low-temperature cracking. A lower filling rate results in a more fragmented cement skeleton, which reduces the fatigue life of RSFP materials. Notably, RSFP materials achieve optimal fatigue life at an air void content of 25 %. The application of RSFP materials was validated through two years of monitoring on an experimental road, confirming their suitability for heavy traffic conditions. These findings promote sustainable road construction practices and offer an effective solution for utilizing RAP in high-traffic infrastructure.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141591"},"PeriodicalIF":7.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on elastic buckling and seismic behavior of two-side connected stiffened shear wall with FRP-laminated steel composite plate frp -层合钢板双面连接加筋剪力墙弹性屈曲及抗震性能研究

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-05-05 DOI: 10.1016/j.conbuildmat.2025.141560

Jinguang Yu , Chu Zhao , Weihui Zhong , Zhiwen Pan , Peizhou Zhang

{"title":"Study on elastic buckling and seismic behavior of two-side connected stiffened shear wall with FRP-laminated steel composite plate","authors":"Jinguang Yu , Chu Zhao , Weihui Zhong , Zhiwen Pan , Peizhou Zhang","doi":"10.1016/j.conbuildmat.2025.141560","DOIUrl":"10.1016/j.conbuildmat.2025.141560","url":null,"abstract":"<div><div>To reduce the additional bending moments generated from the wall plates to the vertical boundary members and to maintain the high level of the structural seismic performance, this paper proposes a two-side connected stiffened shear wall structure with FRP-laminated steel composite plate by introducing the concepts of stiffened dividing grid and steel plate lamination. The corresponding stiffener design method is established, in which the calculation method of shear buckling coefficient for the two-side connected laminated steel plate shear walls (SPSWs), and two-side connected shear wall with FRP-laminated steel composite plate is proposed by finite element (FE) eigenvalue elastic buckling analysis. Subsequently, the specimens of two-side connected stiffened shear wall with laminated steel plate and two-side connected stiffened shear wall with CFRP-laminated steel composite plate are designed, and their seismic performance are compared by quasi-static cyclic loading tests. The test results indicate that the yield bearing capacity, peak bearing capacity, cumulative energy dissipation, and initial stiffness of the structure are increased by 39.06 %, 33.95 %, 20.40 %, and 38.31 %, respectively, by laying the ± 45° CFRP externally and locally laying the corners with 0° CFRP in two-side connected stiffened shear wall with laminated steel plate. Using CFRP reinforcement reduces the maximum out-of-plane deformation of pure steel shear wall by 88.57 %. This shows that arranging ± 45° CFRP layers can effectively restrain the out-of-plane buckling deformation of the wall plates.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141560"},"PeriodicalIF":7.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Durability evaluation of engineered cementitious composite subjected to salt freeze-thaw cycles 盐冻融循环作用下工程胶凝复合材料耐久性评价

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-05-05 DOI: 10.1016/j.conbuildmat.2025.141594

Jincheng Cao , Haipeng Lei , Fangwen Wu , Wenrui Wang , Lanqing He , Zirun Li

{"title":"Durability evaluation of engineered cementitious composite subjected to salt freeze-thaw cycles","authors":"Jincheng Cao , Haipeng Lei , Fangwen Wu , Wenrui Wang , Lanqing He , Zirun Li","doi":"10.1016/j.conbuildmat.2025.141594","DOIUrl":"10.1016/j.conbuildmat.2025.141594","url":null,"abstract":"<div><div>This study aimed to investigate the evolution mechanisms of durability and mechanical properties of engineered cementitious composites (ECC) under the salt freeze-thaw cycle. A multi-scale experimental program was then carried out to evaluate the time-dependent variations in surface damage, microstructural characteristics, and compressive performance of ECC. The test results revealed that the macroscopic damage of ECC exhibited distinct spatial evolution-initiating at the surface (slurry spalling) and advancing inward (fiber-matrix bond layer exposure) as the cycle number climbed, with 100 cycles identified as a critical threshold. The salt freeze-thaw effect promoted the transformation of transition pores within ECC into macropores, and a dynamic evolution mechanism was analyzed. Notably, the physical phase changes of the salt solution dominated the pore expansion at a high cycle number. After 200 cycles, the uniaxial compressive strength and elastic modulus of ECC decreased by approximately 29.34 % and 36.70 %, respectively. The degradation of fiber-matrix interfacial bonding strength shifted the compressive toughness of ECC from strength-controlled to deformation-controlled behavior, primarily due to the transition from bond-slip to friction-slip response at the interface. Finally, a degradation model was developed using an elastoplastic three-phase sphere model, which could be used to predict the residual compressive strength of ECC at varying porosity levels well. The findings of this study can provide valuable technical insights and theoretical foundations for the maintenance and strengthening of concrete structures in cold and saline regions.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141594"},"PeriodicalIF":7.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eco-friendly cement mortar production using rice husk ash and oyster seashell powder: A comprehensive study of mechanical, durability and life cycle properties 稻壳灰和牡蛎壳粉生产环保水泥砂浆：力学、耐久性和生命周期性能的综合研究

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-05-05 DOI: 10.1016/j.conbuildmat.2025.141590

Yutao Guo , Jiaxi Zhang , Muhammad Tahir Lakhiar , Jiaji Wang

{"title":"Eco-friendly cement mortar production using rice husk ash and oyster seashell powder: A comprehensive study of mechanical, durability and life cycle properties","authors":"Yutao Guo , Jiaxi Zhang , Muhammad Tahir Lakhiar , Jiaji Wang","doi":"10.1016/j.conbuildmat.2025.141590","DOIUrl":"10.1016/j.conbuildmat.2025.141590","url":null,"abstract":"<div><div>This study develops eco-friendly cement mortar by synergistically combining rice husk ash (RHA) and oyster calcinated seashell powder (OCSP), leveraging their complementary properties to enhance mechanical and durability performance and sustainability, offering a novel solution for sustainable construction. Mechanical properties, including compressive, splitting tensile, and flexural strength, were evaluated at 7 and 28 days of water curing. Durability was assessed through sodium sulphate resistance, chloride ion penetration, and freeze-thaw tests. The Life cycle assessment was performed using Simapro software by following European standards. Results revealed that mortar with 15 % RHA and 10 % OCSP exhibited approximately 20 % higher compressive, splitting tensile, and flexural strengths compared to the control sample, though strength properties declined at higher RHA and OCSP contents (20 % and 15 %, respectively). Porosity decreased slightly, with the R15S10 mixture showing the lowest porosity (9.7 %) compared to the control (10.2 %). Durability tests of control sample indicated a 20 % compressive strength loss under sodium sulphate exposure, while the 15 % RHA and 10 % OCSP mixture demonstrated five times greater resistance. The chloride ion diffusion coefficient decreased by about 50 % (from 8 ×10⁻¹² m²/s in the control), and freeze-thaw resistance improved significantly with RHA and OCSP incorporation. Life cycle assessment revealed that RHA and OCSP-based mortar had lower environmental impacts in acidification, eutrophication, climate change, photochemical ozone formation, and resource use. These findings highlight the potential of RHA and OCSP based mortar for urban green building construction, where enhanced durability and reduced environmental impact are critical.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":"Article 141590"},"PeriodicalIF":7.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Innovative ultrafine silica-based HFQSAD grouting materials applied for water blocking and reinforcing fractured rock mass in roadways with dispersed water spraying 新型超细硅基HFQSAD注浆材料应用于巷道分散式喷水堵水加固裂隙岩体

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-05-05 DOI: 10.1016/j.conbuildmat.2025.141553

Xue-Feng Liu , Jin-Peng Zhang , Qing Shi , Jin-Bo Yang , Ming-Xue Niu , Bei-Bei Li , Guang-Tan Cheng

{"title":"Innovative ultrafine silica-based HFQSAD grouting materials applied for water blocking and reinforcing fractured rock mass in roadways with dispersed water spraying","authors":"Xue-Feng Liu , Jin-Peng Zhang , Qing Shi , Jin-Bo Yang , Ming-Xue Niu , Bei-Bei Li , Guang-Tan Cheng","doi":"10.1016/j.conbuildmat.2025.141553","DOIUrl":"10.1016/j.conbuildmat.2025.141553","url":null,"abstract":"<div><div>Dispersed water spraying occurs at roof during the excavation of coal mine roadways. This reduces the load-bearing capacity of surrounding rocks and leads to fractures in the support structures, posing a significant challenge in coal mining. Grouting is a commonly used method to seal water-conducting fractures. Therefore, the work presented the development of a novel ultrafine silica-based high-fluidity quick-setting anti-aqueous dispersions (HFQSAD) grouting material for water blocking and reinforcing fractured rock mass. Additionally, an effective construction process was proposed for controlling dispersed water spraying at the roof of roadways. Results showed that ultrafine silica-based HFQSAD grouting materials had high fluidity, quick setting, strong anti-aqueous dispersion, and good durability. The optimal mixture ratio was determined based on fluidity, initial setting time, uniaxial compressive strength (UCS) at 3 days, and anti-aqueous dispersions. The formulation consisted of a water-cement ratio of 0.45, 0.45 % water reducer, 0.45 % accelerator, 0.2 % PAM, 0.7 % HPMC, and 1 % organosilicon defoamer. According to the independently developed model of dynamic water grouting, the grouting material could seal dynamic water channels and reinforce fractured rock mass. Finally, a new grouting construction process was proposed, utilizing the strategy of \"first interception and then blocking for full section treatment\" to address water spraying at the roof of the main belt roadway of the west wing in Shanxian Energy Coal Mine. This method could reduce water spraying by 95.2 %, which sealed dispersed water spraying at roof. The effectiveness and feasibility of the ultrafine silicon-based HFQSAD grouting materials and construction process in treating water spraying were confirmed.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"481 ","pages":""},"PeriodicalIF":7.4,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0