Cement paste characteristics and porous concrete properties
Cement paste characteristics and porous concrete properties
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DOI：
10.1016/j.conbuildmat.2006.12.007
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发表时间：
2008-05-01
影响因子：
7.4
通讯作者：
Yuasa, Y.
中科院分区：
文献类型：
--
作者：
Chindaprasirt, P.;Hatanaka, S.;Yuasa, Y.
本文对水泥净浆特性和多孔混凝土性能进行了研究。结果表明，水灰比、外加剂和搅拌时间对水泥浆体性能有影响。采用低水灰比（0.20-0.25）、掺量为1%的高效减水剂、充分搅拌，可获得适用于多孔混凝土的高粘度、高流动性水泥浆体。具有合适孔隙比的多孔混凝土以适当的膏含量和流动性以及充分的压实来生产。采用净浆流量150-230 mm，顶面振动10 s，振动能量90 kN m/m（2），可制得孔隙率为15-25%，强度为22-39 MPa的优质多孔混凝土。对于低孔隙比，使用低流动性浆体获得了39 MPa的高强度多孔混凝土。对于大孔隙比，使用高流动性浆体获得了22 MPa的多孔混凝土。研究结果还表明，多孔混凝土的强度可以由多孔脆性材料的强度方程来估算。(C)2007爱思唯尔有限公司保留所有权利。
In this paper, cement paste characteristics and porous concrete properties are studied. The results indicate that cement paste characteristics are dependent on the water to cement ratio (W/C), admixture and mixing time. Cement paste with high viscosity and high flow suitable for making porous concrete is obtained with the use of low W/C of 0.20-0.25, an incorporation of 1% superplasticizer, and sufficient mixing. Porous concretes having suitable void ratios are produced with appropriate paste content and flow, and sufficient compaction. Good porous concretes with void ratio of 15-25% and strength of 22-39 MPa are produced using paste with flow of 150-230 mm and top surface vibration of 10 s with vibrating energy of 90 kN m/m(2). For low void ratio, high strength porous concrete of 39 MPa is obtained using paste with low flow. For high void ratio, porous concrete of 22 MPa is obtained using paste with high flow. Furthermore, the results indicate that the strength of porous concrete could be estimated from strength equation of porous brittle material. (C) 2007 Elsevier Ltd. All rights reserved.