再生粗骨料对混凝土坍落度和抗压强度的影响  

STUDY ON THE INFLUENCE OF RECYCLED AGGREGATES ON THE SLUMP AND COMPRESSIVE STRENGTH OF CONCRETE

作　　者：李家和[1,2] 徐得阳[3] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150001 [2]绿色建筑材料国家重点实验室,北京100024 [3]国家住房和城乡建设部科技发展促进中心,北京100853

出　　处：《低温建筑技术》2010年第4期12-14,共3页Low Temperature Architecture Technology

摘　　要：简述了哈尔滨市城市建筑垃圾的产生量和利用度,研究粗骨料的主要指标;采用再生粗骨料20%、30%、50%、70%、100%等质量代替天然碎石骨料配制了C30混凝土,研究了再生粗骨料对混凝土工作性和抗压强度的影响。研究结果表明:在水胶比相同时,混凝土坍落度下降,28d强度降低;若要保持混凝土坍落度基本相同,需采用增加用水量或增大减水剂的方式进行调整。Generation of construction wastes in Harbin and the main performances of the recycled coarse aggregetes made from the waste concrete are summarized in this paper. The influences of the recycled coarse aggregates on the slump and compressive strength of concrete have also been carried out here. And natural aggregates replaced by different contents of recycled coarse aggregates such as 20%, 30%, 50%, 70% and 100% are used in C30 concrete. The research results show that the compressive strength decreases with the slump decreasing under the same water-cement ratio. While we need to increase the content of water or water reducing agent to maintain the same slump.

关 键 词：再生混凝土 再生粗骨料 坍落度 抗压强度 

分 类 号：TU528.0[建筑科学—建筑技术科学]