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所属单位：航空学院

发表刊物：MATERIALS LETTERS

关键字：Porous material Mechanical properties Thermal conductivity Mix Water-reducing agent

摘要：The aim of this research is to examine the effect of the water-binder (W/B) ratio, replacement of cement by fly ash and incorporation of water-reducing agent on the thermal insulation and mechanical properties of porous concrete with a density of 600 kg/m(3). It was found that porous concrete achieved the optimum performance with a W/B ratio of 0.32, a fly ash replacement percentage of 30% and the addition of 0.65% of water-reducing agent. Under these optimal conditions, in the porous concrete specimen obtained the 28-day compressive strength up to 4.37 MPa, a 12% rate of water absorption and a heat conductivity coefficient of 0.116 W/(m.K). Overall, the findings show that the fabricated porous concrete (with a 150 mm thickness and a density of 600 kg/m(3)) fulfills the requirements of ultimate capacity and thermal insulation of the insulation layer for accessible flat roofing. More attractive, the product is cost-effective and may be useful in a wide range of applications. (C) 2017 Elsevier B.V. All rights reserved.

ISSN号：0167-577X

是否译文：否

发表时间：2017-12-15

合写作者：孙亚飞,耿飞,李浩然,张丽芳,刘宏伟

通讯作者：高培伟