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A platform for research: civil engineering, architecture and urbanism
High-strength concrete prepared from recycled aggregate and preparation method of high-strength concrete
The invention provides high-strength concrete prepared from recycled aggregate and a preparation method of the high-strength concrete, and the preparation method comprises the following steps: repeatedly crushing, refining, cleaning and screening construction waste to obtain recycled coarse aggregate with good gradation; modifying the recycled coarse aggregate by adopting polyether polyol, sodium silicate and a coupling agent to obtain modified recycled coarse aggregate; and then, weighing ordinary Portland cement, the modified recycled coarse aggregate, river sand, fly ash, slag powder, a polycarboxylate superplasticizer and water in parts by weight, and uniformly stirring to obtain the high-strength concrete. According to the technical scheme, the recycled coarse aggregate is modified, so that the comprehensive performance of the obtained modified recycled coarse aggregate high-strength concrete is greatly improved, the performance of the modified recycled coarse aggregate high-strength concrete is equivalent to or even slightly superior to that of natural stone high-strength concrete, and the strength grade requirement of C60 high-strength concrete is met; resource utilization of the construction waste is achieved, and waste is turned into wealth.
本发明提供了一种利用再生骨料制备的高强混凝土及其制备方法，其中，制备方法包括以下步骤：将建筑垃圾进行反复破碎细化、清洗和筛选，获得级配良好的再生粗骨料；采用聚醚多元醇、硅酸钠和偶联剂对再生粗骨料进行改性，获得改性再生粗骨料；接着，按重量份称取普通硅酸盐水泥、改性再生粗骨料、河砂、粉煤灰、矿渣粉、聚羧酸减水剂和水，搅拌均匀，制得高强混凝土。上述技术方案通过对再生粗骨料进行改性，获得的改性再生粗骨料高强混凝土的综合性能都大大改善，并且改性再生粗骨料高强混凝土与天然石子高强混凝土的性能相当，甚至略优，且均达到了C60高强混凝土的强度等级要求，实现了建筑垃圾资源化利用，变废为宝。
High-strength concrete prepared from recycled aggregate and preparation method of high-strength concrete
The invention provides high-strength concrete prepared from recycled aggregate and a preparation method of the high-strength concrete, and the preparation method comprises the following steps: repeatedly crushing, refining, cleaning and screening construction waste to obtain recycled coarse aggregate with good gradation; modifying the recycled coarse aggregate by adopting polyether polyol, sodium silicate and a coupling agent to obtain modified recycled coarse aggregate; and then, weighing ordinary Portland cement, the modified recycled coarse aggregate, river sand, fly ash, slag powder, a polycarboxylate superplasticizer and water in parts by weight, and uniformly stirring to obtain the high-strength concrete. According to the technical scheme, the recycled coarse aggregate is modified, so that the comprehensive performance of the obtained modified recycled coarse aggregate high-strength concrete is greatly improved, the performance of the modified recycled coarse aggregate high-strength concrete is equivalent to or even slightly superior to that of natural stone high-strength concrete, and the strength grade requirement of C60 high-strength concrete is met; resource utilization of the construction waste is achieved, and waste is turned into wealth.
本发明提供了一种利用再生骨料制备的高强混凝土及其制备方法，其中，制备方法包括以下步骤：将建筑垃圾进行反复破碎细化、清洗和筛选，获得级配良好的再生粗骨料；采用聚醚多元醇、硅酸钠和偶联剂对再生粗骨料进行改性，获得改性再生粗骨料；接着，按重量份称取普通硅酸盐水泥、改性再生粗骨料、河砂、粉煤灰、矿渣粉、聚羧酸减水剂和水，搅拌均匀，制得高强混凝土。上述技术方案通过对再生粗骨料进行改性，获得的改性再生粗骨料高强混凝土的综合性能都大大改善，并且改性再生粗骨料高强混凝土与天然石子高强混凝土的性能相当，甚至略优，且均达到了C60高强混凝土的强度等级要求，实现了建筑垃圾资源化利用，变废为宝。
High-strength concrete prepared from recycled aggregate and preparation method of high-strength concrete
一种利用再生骨料制备的高强混凝土及其制备方法
LAI GUANGXING (author) / YIN JIANLI (author) / YE JUNHUI (author) / XIAO WEI (author) / CHEN YUJIA (author) / GUO YUANQIANG (author) / LIN TIANXING (author)
2021-04-06
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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