基于微生物增溶活化的再生混凝土微粉基砌体材料制备研究  

Study on preparation of recycled concrete powder based masonry materials by microbial solubilization activation

作　　者：李晓[1] 毛天宇 张建峰 LI Xiao;MAO Tianyu;ZHANG Jianfeng(Shenyang Jianzhu University,Shenyang 110168,China;Shanxi Academy of Architectural Sciences Co.Ltd.,Xi'an 710082,China)

机构地区：[1]沈阳建筑大学,辽宁沈阳110168 [2]陕西省建筑科学研究院有限公司,陕西西安710082

出　　处：《新型建筑材料》2023年第9期114-117,共4页New Building Materials

基　　金：辽宁省教育厅面上项目(LJKZ0592)。

摘　　要：采用不同激发剂对再生混凝土微粉进行激发,确定较优的激发剂种类和掺量。采用不同质量浓度的芽孢杆菌株液对再生混凝土微粉进行14 d的浸泡,研究了菌株液对其活性的影响规律。进而以不同配比制备了再生混凝土微粉基砌体材料。研究结果表明,采用0.10%三乙醇胺+5.00%PCE复合激发剂的效果较好。bio-51767胶质芽孢杆菌株液对再生混凝土微粉有增溶活化作用,且随菌株液浓度降低,活化效果逐渐降低。采用质量浓度为0.077%的菌株液在稀释倍数不高于5倍,处置周期为14 d时,再生混凝土微粉与水泥质量比为55∶45,水胶比0.25,掺最优激发剂,经发泡可以制备MU15、MU20级砌体材料。The activity of recycled concrete powder was activated by different activators,and the optimal activator type and dosage were determined.Bacillus strains with different concentrations were used to immerse the recycled concrete powder for 14 days,and the effect of the strains on its activity was studied.Then the recycled concrete micro-powder only masonry material was prepared in different proportions.The research results show that the optimal chemical activator for recycled concrete powder is the composite activator of 0.10% triethanolamine and 5.00% PCE.The bio-51767 colloidal bacillus strain has a solubilizing and activating effect on recycled concrete powder,and the activation effect gradually decreases with the decrease of the strain concentration.When using a strain solution with a mass concentration of 0.077% and a dilution ratio of no more than 5 times and a disposal period of 14 days,the mass ratio of recycled concrete powder to cement is 55∶45,the water-to-cement ratio is 0.25,and the optimal activator is added,MU15 and MU20 grade masonry can be prepared by foaming material.

关 键 词：微生物 激发剂 增溶 再生混凝土微粉 

分 类 号：TU522.36[建筑科学—建筑技术科学]