Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Recycled concrete with high slump loss resistance and preparation method thereof
The invention discloses recycled concrete with high slump loss resistance and a preparation method thereof. The invention belongs to the field of building materials, the key points of the technical scheme comprise that the raw materials comprise 180-220 parts by weight of cement, 380-490 parts of a modified recycled coarse aggregate, 400-500 parts of gravels, 680-820 parts of natural sand, 90-130parts of fly ash, 65-98 parts of mineral powder, 156-185 parts of water, 4.2-5.8 parts of a polycarboxylate superplasticizer and 3.5-6.4 parts of a slump retaining enhancer. A treatment method of themodified recycled coarse aggregate comprises the steps: a crushed coarse aggregate is placed in a sodium silicate solution with the concentration of 3%-7% to be soaked for 4 h-9 h, then the recycled coarse aggregate is added into a mixed solution of a polyvinyl alcohol solution with the concentration of 8%-12% and a silane emulsion with the concentration of 4%-10% to be continuously soaked for 8 h-12 h, and the effect of improving the slump loss resistance of the recycled concrete is achieved.
本发明公开了一种高保坍性再生混凝土及其制备方法，属于建筑材料领域，其技术方案要点是原料按重量份包括水泥180‑220份、改性再生粗骨料380‑490份、碎石400‑500份、天然砂680‑820份、粉煤灰90‑130份、矿粉65‑98份、水156‑185份、聚羧酸减水剂4.2‑5.8份、保坍增强剂3.5‑6.4份；改性再生粗骨料的处理方法，将破碎后的粗骨料置于浓度为3%‑7%的水玻璃溶液中，浸泡4h‑9h，再将再生粗骨料加入浓度为8%‑12%聚乙烯醇溶液、浓度为4%‑10%硅烷乳液的混合溶液中继续浸泡8h‑12，达到提高再生混凝土的保坍性能的效果。
Recycled concrete with high slump loss resistance and preparation method thereof
The invention discloses recycled concrete with high slump loss resistance and a preparation method thereof. The invention belongs to the field of building materials, the key points of the technical scheme comprise that the raw materials comprise 180-220 parts by weight of cement, 380-490 parts of a modified recycled coarse aggregate, 400-500 parts of gravels, 680-820 parts of natural sand, 90-130parts of fly ash, 65-98 parts of mineral powder, 156-185 parts of water, 4.2-5.8 parts of a polycarboxylate superplasticizer and 3.5-6.4 parts of a slump retaining enhancer. A treatment method of themodified recycled coarse aggregate comprises the steps: a crushed coarse aggregate is placed in a sodium silicate solution with the concentration of 3%-7% to be soaked for 4 h-9 h, then the recycled coarse aggregate is added into a mixed solution of a polyvinyl alcohol solution with the concentration of 8%-12% and a silane emulsion with the concentration of 4%-10% to be continuously soaked for 8 h-12 h, and the effect of improving the slump loss resistance of the recycled concrete is achieved.
本发明公开了一种高保坍性再生混凝土及其制备方法，属于建筑材料领域，其技术方案要点是原料按重量份包括水泥180‑220份、改性再生粗骨料380‑490份、碎石400‑500份、天然砂680‑820份、粉煤灰90‑130份、矿粉65‑98份、水156‑185份、聚羧酸减水剂4.2‑5.8份、保坍增强剂3.5‑6.4份；改性再生粗骨料的处理方法，将破碎后的粗骨料置于浓度为3%‑7%的水玻璃溶液中，浸泡4h‑9h，再将再生粗骨料加入浓度为8%‑12%聚乙烯醇溶液、浓度为4%‑10%硅烷乳液的混合溶液中继续浸泡8h‑12，达到提高再生混凝土的保坍性能的效果。
Recycled concrete with high slump loss resistance and preparation method thereof
一种高保坍性再生混凝土及其制备方法
YU YUXING (Autor:in) / YU JIANSONG (Autor:in) / XU GUANGSEN (Autor:in) / CHEN JINGHUAI (Autor:in)
24.04.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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