摘要
采用预置砖骨料灌浆的方法制作再生混凝土中型砌块,是实现废弃砖骨料再生利用的一种有效途径。以水泥、粉煤灰和再生砖骨料为原料,减水剂和发泡剂为外加剂,通过向预置的砖骨料内灌浆的工艺制备中低强度混凝土,研究水胶比、粉煤灰取代量、泡沫掺量对混凝土强度、干密度和吸水率的影响规律。通过正交试验分析确定最佳配合比为水胶比0.45,粉煤灰取代量20%,根据强度及保温性能要求综合考虑,选择不同泡沫掺量。
It is an effective way to make use of the abandoned brick aggregate by making recycled concrete medium bricks using pre-placed brick aggregate grouting method. The middle and lower strength concrete was prepared by mixing cement,fly ash,recycled brick aggregate as raw materials and water reducing agent,foaming agent as admixtures through the use of pre-placed recycled brick aggregate grouting technique. The influence of water-cement ratio,the substitution quantity of fly ash and foam content on the strength,dry density and water absorption of the concrete specimens was investigated through orthogonal tests. According to the test results,the best water-cement ratio was 0. 45 and the optimal substitution quantity of fly ash was 20%,different amount of foams should be determined based on the strength and heat preservation performance requirements of the concrete.
出处
《水利与建筑工程学报》
2015年第6期214-220,共7页
Journal of Water Resources and Architectural Engineering
基金
"十二五"国家科技支撑计划课题(2014BAL04B05)
山东省科技计划课题(2013GNC11401)
关键词
预置再生砖骨料灌浆混凝土
强度
干密度
吸水率
pre-placed recycled brick aggregate concrete by grouting method
strength
dry density
water absorption
