A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Building waste recycled aggregate composite strengthening method
The invention relates to a construction waste recycled aggregate composite strengthening method. The method comprises the following steps: crushing, cleaning and grading waste concrete to obtain recycled aggregates with different particle sizes; the recycled aggregate with the maximum particle size is subjected to carbonization strengthening in a carbonization box, carbon dioxide is continuously introduced into the carbonization box, the carbon dioxide gas in the carbonization box is kept within a preset concentration range, and the concentration in the carbonization box is 30-80%; the mixing ratio of the carbonized and strengthened recycled aggregate with the maximum particle size to fine aggregate is set, the maximum particle size of the recycled aggregate is selected to be 9.5 mm-12.4 mm, the corresponding water demand range is 190-210 kg/m < 3 >, the fineness modulus is 0.5-0.52, and the concrete compressive strength is 15-20 MPa; calculating the addition amount of the anti-seepage waterproof agent according to the mixing ratio to obtain 3-5wt% of the anti-seepage waterproof agent; the carbonized recycled aggregate and an anti-seepage waterproof agent are stirred and mixed, the composite reinforced recycled aggregate is obtained, the total volume of the recycled aggregate with the maximum particle size accounts for 28-35% of the total volume of the concrete, and the total volume of the cement and the limestone powder material accounts for 16-24% of the total volume of the concrete.
本发明涉及一种建废再生骨料复合强化方法，包括如下步骤：将废混凝土进行破碎、清洗、分级得出不同粒径的再生骨料；将最大粒径的再生骨料在碳化箱内进行碳化强化，所述碳化箱内连续通入二氧化碳并保持箱内二氧化碳气体在预定浓度范围内，所述碳化箱内浓度为30‑80％；对碳化强化后的最大粒径再生骨料与细骨料进行配合比设定，其中再生骨料最大粒径选取9.5mm‑12.4mm，对应需水量范围为190‑210kg/m3、细度模数为0.5‑0.52、混凝土抗压强度为15‑20MPa；根据上述配合比计算抗渗防水剂添加量，得到所述抗渗防水剂用量3‑5wt％；将上述碳化后再生骨料与抗渗防水剂搅拌混合，得到复合强化再生骨料，其中最大粒径再生骨料总体积占混凝土总体积的28～35％，水泥和石灰石粉粉体材料总体积占混凝土总体积的16～24％。
Building waste recycled aggregate composite strengthening method
The invention relates to a construction waste recycled aggregate composite strengthening method. The method comprises the following steps: crushing, cleaning and grading waste concrete to obtain recycled aggregates with different particle sizes; the recycled aggregate with the maximum particle size is subjected to carbonization strengthening in a carbonization box, carbon dioxide is continuously introduced into the carbonization box, the carbon dioxide gas in the carbonization box is kept within a preset concentration range, and the concentration in the carbonization box is 30-80%; the mixing ratio of the carbonized and strengthened recycled aggregate with the maximum particle size to fine aggregate is set, the maximum particle size of the recycled aggregate is selected to be 9.5 mm-12.4 mm, the corresponding water demand range is 190-210 kg/m < 3 >, the fineness modulus is 0.5-0.52, and the concrete compressive strength is 15-20 MPa; calculating the addition amount of the anti-seepage waterproof agent according to the mixing ratio to obtain 3-5wt% of the anti-seepage waterproof agent; the carbonized recycled aggregate and an anti-seepage waterproof agent are stirred and mixed, the composite reinforced recycled aggregate is obtained, the total volume of the recycled aggregate with the maximum particle size accounts for 28-35% of the total volume of the concrete, and the total volume of the cement and the limestone powder material accounts for 16-24% of the total volume of the concrete.
本发明涉及一种建废再生骨料复合强化方法，包括如下步骤：将废混凝土进行破碎、清洗、分级得出不同粒径的再生骨料；将最大粒径的再生骨料在碳化箱内进行碳化强化，所述碳化箱内连续通入二氧化碳并保持箱内二氧化碳气体在预定浓度范围内，所述碳化箱内浓度为30‑80％；对碳化强化后的最大粒径再生骨料与细骨料进行配合比设定，其中再生骨料最大粒径选取9.5mm‑12.4mm，对应需水量范围为190‑210kg/m3、细度模数为0.5‑0.52、混凝土抗压强度为15‑20MPa；根据上述配合比计算抗渗防水剂添加量，得到所述抗渗防水剂用量3‑5wt％；将上述碳化后再生骨料与抗渗防水剂搅拌混合，得到复合强化再生骨料，其中最大粒径再生骨料总体积占混凝土总体积的28～35％，水泥和石灰石粉粉体材料总体积占混凝土总体积的16～24％。
Building waste recycled aggregate composite strengthening method
一种建废再生骨料复合强化方法
2023-05-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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