Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of high-strength semi-recycled coarse aggregate concrete
The invention discloses a preparation method of high-strength semi-recycled coarse aggregate concrete. The high-strength semi-recycled coarse aggregate concrete comprises the following raw materials in parts by weight: 40 to 65 parts of natural gravel, 35 to 57 parts of recycled coarse aggregate, 65 to 78 parts of cement, 27 to 56 parts of natural sand, 27 to 34 parts of a mineral admixture, 23 to27 parts of modified steel fibers, 1 to 7 parts of an enhancer, 47 to 75 parts of water and 3 to 5 parts of a water reducing agent. The preparation method comprises the following steps: performing primary manual separation, secondary magnetic separation and crushing via a crusher on building solid waste to obtain the recycled coarse aggregate with a particle size of 5-30 mm; then conducting washing with water and pickling to remove cement mortar, and carrying out soaking in an enhancer solution so as to obtain the recycled coarse aggregate with low porosity and high strength; modifying the steel fibers by using sodium carbonate, isopropyl triisostearoyltitanate, hydrogen peroxide, concentrated sulfuric acid, sodium tartrate and the like so as to obtain the corrosion-resistant high-strength modified steel fiber; and mixing the high-strength recycled coarse aggregate with the modified steel fibers, cement and other components to obtain the concrete with high strength and good durability.
本发明公开了一种高强半再生粗骨料混凝土制备方法。所述高强半再生粗骨料混凝土各原料组分包括天然碎石40‑65份、再生粗骨料35‑57份、水泥65‑78份、天然砂27‑56份、矿物掺合料27‑34份、改性钢纤维23‑27份、强化剂1‑7份、水47‑75份、减水剂3‑5份。再生粗骨料由建筑固废经过一级人工分选，二级磁分选，破碎机破碎，得到粒径为5‑30mm再生粗骨料；再经水洗、酸洗去除水泥砂浆，强化剂溶液浸泡；得到孔隙率低、强度高的再生粗骨料。由碳酸钠、三异硬脂酰基钛酸异丙酯、双氧水、浓硫酸、酒石酸钠等对钢纤维改性，可得到耐腐蚀、高强度的改性钢纤维。高强度的再生粗骨料与改性钢纤维、水泥等其他组分拌合，可得到高强度、耐久性好的混凝土。
Preparation method of high-strength semi-recycled coarse aggregate concrete
The invention discloses a preparation method of high-strength semi-recycled coarse aggregate concrete. The high-strength semi-recycled coarse aggregate concrete comprises the following raw materials in parts by weight: 40 to 65 parts of natural gravel, 35 to 57 parts of recycled coarse aggregate, 65 to 78 parts of cement, 27 to 56 parts of natural sand, 27 to 34 parts of a mineral admixture, 23 to27 parts of modified steel fibers, 1 to 7 parts of an enhancer, 47 to 75 parts of water and 3 to 5 parts of a water reducing agent. The preparation method comprises the following steps: performing primary manual separation, secondary magnetic separation and crushing via a crusher on building solid waste to obtain the recycled coarse aggregate with a particle size of 5-30 mm; then conducting washing with water and pickling to remove cement mortar, and carrying out soaking in an enhancer solution so as to obtain the recycled coarse aggregate with low porosity and high strength; modifying the steel fibers by using sodium carbonate, isopropyl triisostearoyltitanate, hydrogen peroxide, concentrated sulfuric acid, sodium tartrate and the like so as to obtain the corrosion-resistant high-strength modified steel fiber; and mixing the high-strength recycled coarse aggregate with the modified steel fibers, cement and other components to obtain the concrete with high strength and good durability.
本发明公开了一种高强半再生粗骨料混凝土制备方法。所述高强半再生粗骨料混凝土各原料组分包括天然碎石40‑65份、再生粗骨料35‑57份、水泥65‑78份、天然砂27‑56份、矿物掺合料27‑34份、改性钢纤维23‑27份、强化剂1‑7份、水47‑75份、减水剂3‑5份。再生粗骨料由建筑固废经过一级人工分选，二级磁分选，破碎机破碎，得到粒径为5‑30mm再生粗骨料；再经水洗、酸洗去除水泥砂浆，强化剂溶液浸泡；得到孔隙率低、强度高的再生粗骨料。由碳酸钠、三异硬脂酰基钛酸异丙酯、双氧水、浓硫酸、酒石酸钠等对钢纤维改性，可得到耐腐蚀、高强度的改性钢纤维。高强度的再生粗骨料与改性钢纤维、水泥等其他组分拌合，可得到高强度、耐久性好的混凝土。
Preparation method of high-strength semi-recycled coarse aggregate concrete
一种高强半再生粗骨料混凝土制备方法
CHE CHUNHUA (Autor:in)
01.12.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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