Journal of Testing and Evaluation最新文献_第5页

Swelling Potential and Performance Level of Hot Mix Asphalt Containing Not-Hydrated Ladle Furnace Steel Slags as Filler 含不水合钢渣填料的热拌沥青膨胀势及性能水平

4区材料科学

Journal of Testing and Evaluation Pub Date : 2023-09-19 DOI: 10.1520/jte20230261

Antonio Roberto, Riccardo Monticelli, Riccardo Roncella, Elena Romeo, Gabriele Tebaldi

{"title":"Swelling Potential and Performance Level of Hot Mix Asphalt Containing Not-Hydrated Ladle Furnace Steel Slags as Filler","authors":"Antonio Roberto, Riccardo Monticelli, Riccardo Roncella, Elena Romeo, Gabriele Tebaldi","doi":"10.1520/jte20230261","DOIUrl":"https://doi.org/10.1520/jte20230261","url":null,"abstract":"Nowadays, the use of carbon-neutral materials is an urgent need because of energy consumption and CO2-emissions concerns. Thus, the use of ladle furnace steel slags (LFSs) is becoming common in asphalt pavement fields. One of the limitations on using LFSs is linked to swelling potential because of the changes in chemical structure due to the hydration of their components. In this study, two different asphalt binders, neat and 3.5 % styrene-butadiene-styrene modified, were mixed with limestone coarse aggregates and two fillers (limestone and LFSs) to analyze the swelling potential and the performance levels of hot mix asphalts containing not-hydrated LFSs as filler. The analysis was conducted performing the SuperPave indirect tensile test protocol at 10°C and by using a 3D-digital image correlation metadata model (3D-DICM) capable of computing the volumetric expansion of materials after four different periods of conditioning in water (24, 48, 168, and 336 h). The results showed no significant differences among the analyzed materials, highlighting that the volumetric expansion is mainly linked to the aggregates’ water absorption. On the other hand, conditioning time seems to affect the deformability of the mixtures, influencing performance level.","PeriodicalId":17109,"journal":{"name":"Journal of Testing and Evaluation","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135010773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation and Testing of Carbonation Behavior of Sprayed Concrete with Different Liquid Accelerators 不同液体促进剂对喷射混凝土碳化性能的评价与试验

4区材料科学

Journal of Testing and Evaluation Pub Date : 2023-09-18 DOI: 10.1520/jte20230300

Renhe Yang, Pengyu Zhang, Dongmei Wang, Qian Sun, Tingshu He

{"title":"Evaluation and Testing of Carbonation Behavior of Sprayed Concrete with Different Liquid Accelerators","authors":"Renhe Yang, Pengyu Zhang, Dongmei Wang, Qian Sun, Tingshu He","doi":"10.1520/jte20230300","DOIUrl":"https://doi.org/10.1520/jte20230300","url":null,"abstract":"This article mainly tested and evaluated the carbonation resistance of sprayed concrete mixed with different liquid accelerators, and thus attempted to establish a prediction model for the carbonation depth of sprayed concrete. Firstly, the influence of alkaline liquid accelerator based on sodium aluminate (AR), alkaline-free liquid accelerator based on aluminum sulfate (AS), and alkali-free liquid accelerator based on fluoroaluminate (AF) on carbonation resistance of sprayed concrete was explored. In addition, the porosity and pore structure distribution of ordinary sprayed concrete (OSC), sprayed concrete with AR (SC-AR), sprayed concrete with AS (SC-AS), and sprayed concrete with AF (SC-AF) were analyzed by the mercury intrusion porosimetry. The carbonation depth and compressive and splitting tensile strength also were tested. Furthermore, the scanning electron microscopy was employed to observe the micromorphology of hydration products. The experimental results indicated that the carbonation depth order of sprayed concrete was as follows: SC-AR > SC-AF > SC-AS > OSC. After analyzing the disparity of SC-AR, SC-AS, and SC-AF carbonation depth caused by AR, AS, and AF dosage, the influence coefficients of sprayed concrete carbonation depth were introduced. Finally, the carbonation depth prediction models of SC-AR, SC-AS, and SC-AF were preliminarily established.","PeriodicalId":17109,"journal":{"name":"Journal of Testing and Evaluation","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135110019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strength and Durability Assessment of Self-Healing Bio-Based Composite Concrete under Different Exposure Conditions 不同暴露条件下自愈生物基复合混凝土强度与耐久性评价

4区材料科学

Journal of Testing and Evaluation Pub Date : 2023-09-18 DOI: 10.1520/jte20230271

A. Rajesh, A. Sumathi, D. Gowdhaman

{"title":"Strength and Durability Assessment of Self-Healing Bio-Based Composite Concrete under Different Exposure Conditions","authors":"A. Rajesh, A. Sumathi, D. Gowdhaman","doi":"10.1520/jte20230271","DOIUrl":"https://doi.org/10.1520/jte20230271","url":null,"abstract":"Cracks in concrete are predestined, and they lay a pathway for water and aggressive chemical substances, which leads to deterioration of concrete ingredients and affects the service life of concrete structures. In the recent years, natural fibers and bacteria species are used to improve rheological properties and to heal concrete cracks. Precipitation of calcium carbonate crystals produced by bacteria in concrete cracks is highly acceptable to increase the mechanical and durability properties. In this research, Bacillus paramycoides species is isolated from concrete efflorescence and is used for self-healing. For bacteria immobilization, natural fibers like coir, flax, and jute are used as suitable carriers. Furthermore, the study on the performance of bacteria in crack healing and strengthening properties is in need for different curing/exposure conditions such as full-wet, wet–dry, saturated normal soil, and saturated marine soil. The performance of bacteria in concrete is estimated by a series of tests such as compressive strength, compressive strength regains, tensile strength, impact strength, sorptivity, and deterioration of concrete under acid curing. Based on the test results, the selected bacteria have the ability to heal crack widths of 0.3–1.1 mm with the average healing rate of 83 %, 92 %, 76 %, and 42.5 % for full-wet, wet–dry, normal soil, and marine soil exposure, respectively. Microstructure studies were investigated for fiber-reinforced concrete and bacteria-immobilized fiber-reinforced concrete to determine the composition of elements formed in calcium carbonate precipitates. In this work, the results suggest that natural fibers can be used as sustainable carrier material for crack healing, strength, and durability improvement in concrete.","PeriodicalId":17109,"journal":{"name":"Journal of Testing and Evaluation","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135110020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Intelligent Speech Multifeature Recognition Method Based on Deep Machine Learning: A Smart City Application 基于深度机器学习的智能语音多特征识别方法在智慧城市中的应用

4区材料科学

Journal of Testing and Evaluation Pub Date : 2023-09-13 DOI: 10.1520/jte20220686

Ye Song, Kai Yan

引用次数: 0

Quantitative Analysis of Mancozeb in Water Quality Detection Based on Spectrophotometry 分光光度法定量分析水质检测中的代森锰锌

4区材料科学

Journal of Testing and Evaluation Pub Date : 2023-09-13 DOI: 10.1520/jte20230358

Yinshan Yu, Ding Ping, Jinsong Wei, Hui Zhang, Dongyang Zhang, Yudong Yang

引用次数: 0

Utilization of Atomic Force Microscopy (AFM) in Characterizing Microscopic Properties of Asphalt Binders: A Review 原子力显微镜(AFM)在表征沥青粘结剂微观性能中的应用综述

4区材料科学

Journal of Testing and Evaluation Pub Date : 2023-09-13 DOI: 10.1520/jte20220672

Enhao Zhang, Liyan Shan, Yiqiu Tan

引用次数: 0

Abnormal Node Location Algorithm in Multi-source Heterogeneous Network Based on Association Rules 基于关联规则的多源异构网络异常节点定位算法

4区材料科学

Journal of Testing and Evaluation Pub Date : 2023-09-13 DOI: 10.1520/jte20220717

Yinghui Ma, Liping Hao

引用次数: 0

Mechanical Properties and Durability of High Toughness Concrete (HTC) Modified by EVA and SB Latex Powder EVA和SB乳胶粉改性高韧性混凝土(HTC)的力学性能和耐久性

4区材料科学

Journal of Testing and Evaluation Pub Date : 2023-09-11 DOI: 10.1520/jte20230194

Zhen-gang Feng, Xiaoran Gong, Xiangnan Li, Qi Cui, Dongdong Yao

{"title":"Mechanical Properties and Durability of High Toughness Concrete (HTC) Modified by EVA and SB Latex Powder","authors":"Zhen-gang Feng, Xiaoran Gong, Xiangnan Li, Qi Cui, Dongdong Yao","doi":"10.1520/jte20230194","DOIUrl":"https://doi.org/10.1520/jte20230194","url":null,"abstract":"To study the effect of different polymer latex powders on mechanical properties and durability of high toughness concrete (HTC), ethylene vinyl acetate (EVA) and styrene butadiene (SB) were used to prepare modified HTCs. The flexural strength, compressive strength, and toughness of the HTC specimens were investigated by the flexural strength test, compressive strength test, and toughness test, respectively. Moreover, the freeze-thaw test, salt ion freeze-thaw test, dry shrinkage test, rapid chloride migration test, and carbonation test were carried out to evaluate the influence of EVA and SB on durability of HTC. Results show that EVA and SB with proper content can obviously improve the flexural performance and toughness of HTC. The durability of HTC, including the frost resistance, salt ion frost resistance, dry shrinkage resistance, chloride ion penetration resistance, and carbonization resistance, can be totally enhanced with the addition of the two polymer latex powders because the EVA and SB can interweave with hydration products of the HTC to form a network structure, leading to a denser structure with less harmful and very harmful holes in HTC and thus preventing penetration and erosion inside the HTC.","PeriodicalId":17109,"journal":{"name":"Journal of Testing and Evaluation","volume":"364 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135937972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Smart City Distributed Trade Economy Dynamic Scheduling of E-Commerce Platform Based on Reinforcement Learning Algorithm 基于强化学习算法的智能城市电子商务平台分布式经贸动态调度

IF 1.2 4区材料科学

Journal of Testing and Evaluation Pub Date : 2023-09-11 DOI: 10.1520/jte20220682

Yimeng Tang

引用次数: 0

Electrochemical Corrosion Behavior of Thermally Sprayed Nichrome Coating on Duplex Stainless Steel 双相不锈钢表面热喷涂镍铬涂层的电化学腐蚀行为

IF 1.2 4区材料科学

Journal of Testing and Evaluation Pub Date : 2023-09-08 DOI: 10.1520/jte20220647

Roshan Kuruvila, Thirumalai Kumaran Sundaresan, Farooq Ahmed, Uthayakumar Marimuthu

引用次数: 0