The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019)最新文献_第4页

Initial data preparation for 3D modelling of heritage building 文物建筑三维建模的初步数据准备

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.049

Miroslavas Pavlovskis, D. Migilinskas, Vladislavas Kutut, J. Antuchevičienė

{"title":"Initial data preparation for 3D modelling of heritage building","authors":"Miroslavas Pavlovskis, D. Migilinskas, Vladislavas Kutut, J. Antuchevičienė","doi":"10.3846/mbmst.2019.049","DOIUrl":"https://doi.org/10.3846/mbmst.2019.049","url":null,"abstract":"Latterly problems of restoration of historic buildings have become especially important. Historical buildings\u0000require special attention while preserving their cultural and artistic values, so the three-dimensional digital model of\u0000the building can be used preparing their operational or renewal plans. The aim of the presented research is to analyze\u0000strengths, weaknesses, opportunities, and threats (SWOT) of preparation the initial data, heritage building 3D model\u0000development and parametric object databases creation. The object of the research is the Sapieha Palace built in Baroque style in 1689–1691 in the capital city of Lithuania. Applied research methods and tools – initial data collection\u0000by historical drawing analysis, manual measurement, photogrammetry methods, and “As-Built” 3D model creation.\u0000The results of the presented case study were analyzed by applying SWOT methodology as well as compared with the\u0000similar studies in the scientific literature. The research provides the basis for further construction heritage studies and\u0000analysis of possible object conversion issues.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129227695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bearing capacity and stiffness of pile group foundation 群桩基础的承载力和刚度

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.135

A. Norkus, V. Martinkus

{"title":"Bearing capacity and stiffness of pile group foundation","authors":"A. Norkus, V. Martinkus","doi":"10.3846/mbmst.2019.135","DOIUrl":"https://doi.org/10.3846/mbmst.2019.135","url":null,"abstract":"Pile group foundations are widely employed in geotechnical design. Bearing capacity increment/reduction of\u0000pile group (PG) foundation in design practice often described via empirical efficiency factor (EF), a multiplier to sum\u0000of single piles (SP) resistances, when they act isolated. The magnitude of EF depends on spacing of SP in PG, soil\u0000parameters, configuration of piles, friction of soil-pile, etc. Proposed predictions for choosing the EF magnitude are\u0000contradictory. The tests of displacement SP and PG tests conducted in laboratory conditions for 2 spacing cases, ground\u0000stress-strain evolution of PG analyzed. The EF magnitude reproduced from tests results compared with proposed by\u0000different authors predictions. The pronounced effect of installation sequence to displacement SP response measures,\u0000when acting in PG estimated during the tests. From practical point, this phenomenon if ignored for certain connection\u0000case of superstructure with PG cap and that of SP with PG cap may cause unexpected PG foundation movements,\u0000subsequently resulting the additional stressing of superstructure and foundation. SP installation effect for displacement\u0000PG foundation measures of ground response should be properly evaluated in design of constructional elements of superstructure and foundation.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130887744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of activation of microsphere and latex base addition on mechanical properties of concrete 微球活化及乳胶基掺量对混凝土力学性能的影响

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.063

W. Dobaczewska, W. Kubissa, K. Prałat, Patryk Tomczak

{"title":"Influence of activation of microsphere and latex base addition on mechanical properties of concrete","authors":"W. Dobaczewska, W. Kubissa, K. Prałat, Patryk Tomczak","doi":"10.3846/mbmst.2019.063","DOIUrl":"https://doi.org/10.3846/mbmst.2019.063","url":null,"abstract":"In a modern civil engineering, it is important to erection construction in extremely complicated and difficult\u0000environmental conditions. Additives and admixes to concrete enable to achieved higher mechanical properties\u0000of concrete mixtures. This operation causes, the constructions accomplish durability in various environmental conditions. In the article, authors described scientific research made on concrete with additives: latex based polymer and\u0000microspheres. The tested additives were used in to different proportion each and they were combined with each other.\u0000The aim of research was to determine influence this two additives on compressive strength after 28 days, after 90\u0000days, a tensile splitting strength, a sorptivity, a freeze-thaw resistance and a compressive strength on the specimens\u0000after freeze-thaw resistance test. Received results clearly show decrease in compressive strength of the modified concrete mixtures. The specimens prepared without additives achieved the highest compressive strength results.The researchers observed also increasing liquidity of concrete mixtures and decreasing sorptivity of hardener\u0000concrete under the influence of latex based polymer. The knowledge of basic properties of microspheres from\u0000co-combustion of coal is fundamental to its effect usage of building industry.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131176542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of physical and mechanical properties of fired-clay bricks incorporating both mineral and organic wastes 含矿物和有机废物的烧结砖的物理和机械性能的评价

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.004

M. Achik, H. Benmoussa, A. Oulmekki, M. Ijjaali, N. El Moudden, O. Kizinievič, V. Kizinievič

{"title":"Evaluation of physical and mechanical properties of fired-clay bricks incorporating both mineral and organic wastes","authors":"M. Achik, H. Benmoussa, A. Oulmekki, M. Ijjaali, N. El Moudden, O. Kizinievič, V. Kizinievič","doi":"10.3846/mbmst.2019.004","DOIUrl":"https://doi.org/10.3846/mbmst.2019.004","url":null,"abstract":"The clay brick is one of the oldest building materials, and as the use of waste in the bricks can reduce clay\u0000consummation and the environmental burden due to the accumulation of waste, the present study was chosen, the addition of mineral and organic waste to the clay brick.\u0000The added value of this work, which was carried out within the Institute of Building Materials at VGTU, is that the mixture\u0000studied is very special, because the raw materials used are:\u0000− Yellow Clay (C) from Fez which is used only in the field of pottery;\u0000− Pyrrhotite Ash (PA) which is a mineral waste produced during the manufacture of sulphuric acid from the roasting of\u0000pyrrhotite ore. This waste is stored in the open air since 1982 and until now it doesn't have any specific use;\u0000− Cedar Sawdust (S) is an organic waste regenerate by the artisanal sector from Fez.\u0000The bricks’ technological properties depended on the amount of ashes used. So, adding 5% S to the mixture (20% PA – 80% C)\u0000gives rise to a new material that is light, porous with a natural brick red colour. Most importantly, this material exhibits mechanical strength according to the standards of a terracotta brick.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124519681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Simplified approach for analyse of shear walls for multistorey timber buildings 多层木结构建筑剪力墙分析的简化方法

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.114

Inese Virbule, D. Serdjuks, K. Buka-Vaivade

引用次数: 0

The numerical analysis of the long-term behaviour of the reinforced concrete beams strengthened with carbon fibre reinforced polymer: Cracking 碳纤维增强聚合物加固钢筋混凝土梁长期性能的数值分析:开裂

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.010

M. Daugevičius, J. Valivonis, T. Skuturna

引用次数: 0

Investigation of Portland cement composites containing high amounts of different kinds of fly ashes 高掺量不同粉煤灰硅酸盐水泥复合材料的研究

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.113

I. Wilińska, B. Pacewska, W. Kubissa

{"title":"Investigation of Portland cement composites containing high amounts of different kinds of fly ashes","authors":"I. Wilińska, B. Pacewska, W. Kubissa","doi":"10.3846/mbmst.2019.113","DOIUrl":"https://doi.org/10.3846/mbmst.2019.113","url":null,"abstract":"Utilization of fluidized fly ash in cement composite is problematic, e.g. because of its changeable chemical composition and increased water demand of the mixture. However, this kind of by-product shows some self-cementing properties, which may be beneficial for low-cement mixtures. The article compares the impact of various kinds of fly ashes, i.e.\u0000fluidized fly ash and conventional one, and their mixtures on hydration of fly ash–cement compositions in relation to properties of final material. The amount of fly ash in the binder was 50 wt%. Calorimetry, thermal analysis (TG/DTG) and infrared\u0000spectroscopy were used. Compressive strength and water absorption of hardened composites were also registered. It was\u0000found that both fly ashes exhibit delay effect in fly ash-cement pastes which causes extension of initial setting time and lower\u0000heat released compared to the reference without fly ash. At later hydration days, fluidized fly ash develops higher pozzolanic\u0000activity than conventional one. Compositions with fluidized fly ash show better compressive strength compared to those\u0000containing conventional one. Mixing of different materials of high and low activity (fluidized and conventional fly ash in this\u0000case) seems to be a good way for creation of new cement replacement material.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121277119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The effect of glass powder on physical and mechanical properties of hardened cement paste 玻璃粉对硬化水泥浆体物理力学性能的影响

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.137

K. Barkauskas, D. Nagrockienė, I. Girniene

{"title":"The effect of glass powder on physical and mechanical properties of hardened cement paste","authors":"K. Barkauskas, D. Nagrockienė, I. Girniene","doi":"10.3846/mbmst.2019.137","DOIUrl":"https://doi.org/10.3846/mbmst.2019.137","url":null,"abstract":"The article analyses the effect of finely crushed glass on the properties of hardened cement paste. Materials\u0000used for the test: Portland cement CEM I 42.5 R, finely crushed glass (particle size ≤75 µm), and water. Seven\u0000compositions of cement paste mixes with different amounts of crushed glass (0%, 5%, 10%, 15%, 20%, 25%, 30%)\u0000added by weight of cement were designed. Compressive strength, density and ultrasonic pulse velocity of modified\u0000hardened cement paste with different content of crushed glass were measured in the tests. The test results revealed the\u0000increase of density, ultrasonic pulse velocity and compressive strength in specimens of hardened cement paste\u0000containing 5% and higher percentage of crushed glass after 7, 28 and 56 days of hardening. Microstructure tests revealed\u0000that crushed glass had an effect on the microstructure of hardened cement paste after 7 days of curing. X-ray analysis\u0000revealed the effect of crushed glass on the physical composition of hardened cement paste hydration products. Hardened\u0000cement paste containing 5% of crushed glass by weight of cement was found to have higher strength and density\u0000compared to unmodified cement paste.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115863327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Mechanical properties of copper slag waste based CLSM mixtures 铜渣废基CLSM混合料的力学性能

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.021

R. Jaskulski, W. Kubissa

引用次数: 2

Thermal resistance of alkaline fused phosphate sludge-based geopolymer mortar 碱性熔融磷酸盐污泥基地聚合物砂浆的耐热性

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI: 10.3846/mbmst.2019.073

S. Moukannaa, A. Nazari, A. Bagheri, M. Loutou, R. Hakkou

{"title":"Thermal resistance of alkaline fused phosphate sludge-based geopolymer mortar","authors":"S. Moukannaa, A. Nazari, A. Bagheri, M. Loutou, R. Hakkou","doi":"10.3846/mbmst.2019.073","DOIUrl":"https://doi.org/10.3846/mbmst.2019.073","url":null,"abstract":"The present study investigates the thermal behaviour of phosphate sludge-based geopolymers. Phosphate\u0000sludge which is a by-product from phosphate beneficiation processes was activated using the alkaline fusion method\u0000to improve the geopolymer activity of this material. Then, the mechanical properties as well as the thermal behaviour\u0000of the resulted geopolymer mortar were studied. The effect of sodium hydroxide addition and fusion temperature on\u0000the mechanical properties and the thermal behaviour of the geopolymers were assessed using compressive strength\u0000tests before and after thermal shock cycles at different temperatures (350, 500, 650 °C). The mineralogical composition of the fused materials was investigated using XRD measurement and the microstructure of the geopolymer mortars was studied using FTIR. The obtained results showed that NaOH content as well as the temperature of fusion are\u0000essential parameters controlling the structure and the strength of the developed geopolymeric gel. Exposure to elevated temperatures up to 650 °C induces a decrease in compressive strength between 58 and 71%. However, a further increase in the temperature of exposure till 800 °C induces a development of compressive strength. Overall, geopolymers with good compressive strength up to 40 MPa could be synthesized in the optimum conditions of fusion: 10% of\u0000NaOH and 550 °C.","PeriodicalId":169478,"journal":{"name":"The proceedings of the 13th international conference \"Modern Building Materials, Structures and Techniques\" (MBMST 2019)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126188578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1