摘要
为了研究泡沫混凝土的抗火灾性能,利用自配的复合发泡剂制作泡沫混凝土标准试件,养护28 d后,在液化石油气火焰上进行灼烧试验,测定了标准试件在灼烧后的强度和结构变化.结果表明,泡沫混凝土具有不燃特性,具有较高的抗火灾性能;高温灼烧后的泡沫混凝土,抗压强度降低的程度与其密度有关,密度越大降低程度越小;泡沫混凝土的抗压强度随灼烧时间的延长而降低,但降低的幅度不大;泡沫混凝土内部孔结构对其抗压强度有较大影响,均匀细小的气孔对泡沫混凝土的抗压强度有利,其抗火灾性能也较高.研究表明,泡沫混凝土作为一种新型的外墙保温材料时,具有优良的抗火灾性能,可以取代阻燃聚氨酯、阻燃聚苯乙烯等可燃性有机保温材料,从而大大降低火灾损失.
In order to study the fire resistance performance of foamed concrete, the foamed concrete standard specimen was made of self-developed compound foaming agent, curing after 28d, in the liquefied petroleum gas flame burning on the test, measured after the standard test piece in the ignition strength and structural changes. The results showed that foamed concrete had properties of non - combustible and high fire - resist- ance, higher resistance to fire performance. The extent of compressive strength decreasement of foamed con- crete after burning is related to its density. The smaller the density, the greater the degree of reduction. Com- pressive strength of concrete decreased with foam burning time, but decreased marginally. Foam concrete compressive strength has great influence on even the small pores are helpful on the compressive strength of foam concrete which leading the higher resistance to fire performance. The results show that foam concrete as a new external wall insulation materials, has excellent resistance to fire performance. You can replace the flame - retardant polyurethane, polystyrene and other combustible organic flame - retardant insulation materials to reduce the fire losses.
出处
《河南理工大学学报（自然科学版）》
CAS
2011年第2期211-214,共4页
Journal of Henan Polytechnic University（Natural Science）
基金
河南省重点科技攻关项目(0821002230032)
煤炭科技攻关项目(H09-58)
河南省教育厅自然科学基金资助项目(2008B560005)
关键词
泡沫混凝土
灼烧
抗压强度
干体积密度
孔结构
foamed concrete
burning
compressive strength
dry bulk density
pore structure
