Materials Structures Technology最新文献

Measurement of the distribution of polyoxymethylene particle size using the laser diffraction method 用激光衍射法测定聚甲醛粒径分布

Materials Structures Technology Pub Date : 2019-10-16 DOI: 10.31448/mstj.02.01.2019.50-60

K. Prałat, M. Łukasiewicz, P. Miczko, Katarzyna Lesiecka

引用次数: 1

New ways of utilizing lime in modern building technology 石灰在现代建筑技术中的新应用

Materials Structures Technology Pub Date : 2019-10-16 DOI: 10.31448/mstj.02.01.2019.61-69

Y. Yakymechko, R. Jaskulski, I. Lutsyuk

引用次数: 4

Strengthening of Masonry Pillars by Textile Reinforced Concrete Wrapping of Different Thickness 不同厚度纺织钢筋混凝土包覆加固砌体柱

Materials Structures Technology Pub Date : 2019-01-08 DOI: 10.31448/MSTJ.01.02.2018.42-49

Ondřej Holčapek, Jan Machovec, P. Reiterman

{"title":"Strengthening of Masonry Pillars by Textile Reinforced Concrete Wrapping of Different Thickness","authors":"Ondřej Holčapek, Jan Machovec, P. Reiterman","doi":"10.31448/MSTJ.01.02.2018.42-49","DOIUrl":"https://doi.org/10.31448/MSTJ.01.02.2018.42-49","url":null,"abstract":"This paper is focused on strengthening of brick masonry columns by thin layer of textile reinforced concrete (TRC). The sets of masonry columns with dimensions 290 × 290 × 1040 mm were produced. These columns were prepared with modified shape of the cross-section to achieve a polygonal shape. This solution brings significant increase of the structure load capacity and efficiency of the applied strengthening. Used TRC consists of micro-concrete with similar properties as high-performance concrete and reinforcement from E-glass. Used textile reinforcement has basic weight 585 g/m 2 with mesh size 5.5 × 4.5 mm, while the average compressive and flexural strength of the used micro-concrete achieved 93.6 MPa and 15.6 MPa respectively. Used masonry achieved characteristics compressive strength 7.2 MPa, the calculation was performed with respect to properties of bricks with dimensions 140 × 65 × 290 mm and used lime-cement mortar. The reinforced fabric was applied in one and three layers and the effect of number of strengthening layers was investigated. Axial loading arrangement was used for the determination of maximal achieved strenght and the efficiency of additionaly applied strengthening layer. It was confirmed that one layer of strenghtening increased the load capacity by nearly 100 %, three layers by over 200 %, respectively. Application of TRC performs efficient procedure for the improvement of load capacity of masonry structures, which could be applied in case of renovation of historical structures.","PeriodicalId":192883,"journal":{"name":"Materials Structures Technology","volume":"77 14","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113970290","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

Introduction to 3D Concrete Printing Technology: A state of the art 介绍3D混凝土打印技术:一种艺术状态

Materials Structures Technology Pub Date : 2019-01-08 DOI: 10.31448/MSTJ.01.02.2018.32-41

Jan Machovec

引用次数: 0

Structure of Polymer-cement Composite optimized with Secondary Raw Materials 二次原料优化聚合物-水泥复合材料结构

Materials Structures Technology Pub Date : 2019-01-07 DOI: 10.31448/MSTJ.01.01.2018.26-31

P. Figala, R. Drochytka, V. Černý, J. Kolísko

{"title":"Structure of Polymer-cement Composite optimized with Secondary Raw Materials","authors":"P. Figala, R. Drochytka, V. Černý, J. Kolísko","doi":"10.31448/MSTJ.01.01.2018.26-31","DOIUrl":"https://doi.org/10.31448/MSTJ.01.01.2018.26-31","url":null,"abstract":"Structure This paper focuses on possibilities of use of selected secondary raw materials for modification of developed high strength coating based on polymer-cement. The aim is achieving the same or better physical-mechanical properties of resulting material at maximal level of substitution of cement with secondary raw materials. Because of high contents of amorphous SiO2 two secondary raw materials were selected: high temperature fly ash and recycled soda-lime glass to replace cement by 20 and 40% by weight. These secondary raw materials were pre-treated in ball grinder to specific surface of the substituted Portland cement CEM I 42.5 R, 300 m∙kg and specific surface 400 m∙kg (±50 m∙kg). Selected test specimens were subjected to compressive strength determination after 3, 28 and 90 days. Samples of selected mix-designs were subjected to Computed Tomography to determine influence of substitution of cement with individual additions on structure of polymer-cement composite. The main finding is that suitable secondary raw materials can successfully substitute binder to the extent of 40%; in case of fly ash, the compressive strength after 28 days was higher by 10% and in case of ground glass by 12%. At the same time, positive influence of ground glass on density and integrity of the cement stone was proved. Based on the findings it can be stated that suitable secondary raw materials are capable of enhancing properties of the developed high strength coat. The main result is enhancement of basic physico-mechanical properties and at the same time achieving better structure of the coat, which is the elementary condition for high chemical resistance of cement based composite material.","PeriodicalId":192883,"journal":{"name":"Materials Structures Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130014699","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: 2

Comparative analysis of dependence of the elastic modulus of concrete on its composition 混凝土弹性模量随混凝土成分变化的对比分析

Materials Structures Technology Pub Date : 2018-09-24 DOI: 10.31448/mstj.01.01.2018.1-9

引用次数: 2

H2 generation in cement pastes under gamma irradiation: A state of the art 伽马辐照下水泥浆中H2的生成:最新研究进展

Materials Structures Technology Pub Date : 2018-09-24 DOI: 10.31448/mstj.01.01.2018.18-25

引用次数: 0

Influence of environmental impacts on sorptivity of concrete with CEM II/B-V and CEM III/A cement 环境影响对CEMⅱ/B-V和CEMⅲ/A水泥混凝土吸附性能的影响

Materials Structures Technology Pub Date : 2018-09-24 DOI: 10.31448/mstj.01.01.2018.10-17

引用次数: 0