典型文献
Early-age Hydration Characteristics of Composite Binder Containing Graphite Powder
文献摘要：
The early-age hydration characteristics of composite binder containing graphite powder (GP) with two different finenesses were investigated by determining the hydration heat, thermo gravimetric, morphology of hardened paste as well as the compressive strength of mortar. The experimental results show that: replacing 2％-6％ of cement with graphite powder significantly improves the piezoresistive effect of early age mortar, can be used to monitor accidental loads caused by dropped objects, collisions, or other accident events, and thus avoids initial damage. Some GP provides additional nucleation sites that lead to a fast formation of hydration products (nucleation-site effect). However, due to the almost hydrophobic water contact angle, most of the GP causes a large number of micro-cracks in the hydrated paste (gap effect). Because of the lamellar shape and high surface energy, GP is easily balled and can not be uniformly distributed in the composite, resulting in clumping together and wrapping some of the cement particles (barrier effect). Due to nucleation-site effect, when the dosages of coarse and fine GP reached 2％ and 4％, 1 d strength were increased by 9.1％ and 9.6％, respectively. At 3 days, as the interior damage caused by the gap effect gradually increased, and the retarding effect on cement hydration caused by barrier effect was enhanced. GP has an obvious negative effect on compressive strength. However, micro-cracks caused by fine GP are less, so its negative effect on 3 d compressive strength is lower.
文献关键词：
中图分类号：
作者姓名：
HE Wei;SONG Shaomin;MENG Xia;ZHANG Pengchong;SUN Xu
作者机构：
School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Ar-chitectural Design and Research Institute of Tsinghua University Co.,Ltd.,Beijing 100084,China
文献出处：
引用格式：
[1]HE Wei;SONG Shaomin;MENG Xia;ZHANG Pengchong;SUN Xu-.Early-age Hydration Characteristics of Composite Binder Containing Graphite Powder)[J].武汉理工大学学报（材料科学版）（英文版）,2022(06):1252-1261
A类：
finenesses,balled
B类：
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AB值：
0.571449
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