Materials Reports  2020, Vol. 34 Issue (Z2): 246-249 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Influence of Different Adsorptive Powders on Concrete Performance |
| BIAN Libo, TAO Zhi
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| School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044,China |
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Abstract To clarify the influence of different absorbent powder materials on cement-based materials,this paper studies the influence of limestone powder, tuff powder, and montmorillonite at 20% and 40% on the working performance, mechanical properties and durability of concrete. The experimental results show that compared with the benchmark group, the montmorillonite increased the amount of polycarboxylate water-reducing agent by 6-8 times, and the 28 d compressive strength decreased by 38.4% and 54.1% respectively, the drying shrinkage rate increased by 1.99 times, the carbonization resistance and the chloride ion permeability were significantly reduced. Tuff powder increased the amount of water redu-cing agent by 36.7%—64.5%, reduced 28 d compressive strength by 7.4% and 15.9%, respectively, increased drying shrinkage by 1.44 times, there is no obvious impact on resist carbonization and resist chloride ion permeability. Limestone powder changed the amount of water-reducing agent by -32.4%—30.8%, reduced the 28 d compressive strength by 18.3% and 13% respectively, the drying shrinkage rate was close to the benchmark group, and the resistance to chloride ion penetration increased by about 12.9%.
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Published: 08 January 2021
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| Fund:This work was financially supported by Beijing Municipal Education Commission Scientific Research Program General Project (KM201710016016),Beijing Jianzhu University Municipal University Basic Operating Expenses Special Fund-QN Youth Scientific Research Innovation Special Project (X18260). |
| About author:: Libo Bian, received his Ph.D.degree in engineering from Beijing University of Science and Technology in June 2016. Now, he is associate professor in Beijing University of Civil Engineering and Architecture. He mainly teaches the experimental courses of building material testing technology, civil engineering material and inorganic nonmetallic material engineering. He has presided over projects of Beijing Natural Science Fund, Beijing Education Commission, Key R&D technology of the Science and Technology Ministry and enterprise entrusted projects. The main research fields: multi-component composite new cementitious material technology, porous concrete technology and special and new building mate-rials. Authorized/applied for 16 invention patents, 7 utility models, and published more than 20 related papers. |
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