Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Heating-carbonization strengthening method for improving carbonization depth of recycled aggregate
The invention belongs to the technical field of resource utilization of bulk solid wastes, and provides a heating-carbonization strengthening method for improving the carbonization depth of recycled aggregate, which comprises the following steps: vibrating and heating the recycled aggregate at 80-120 DEG C for 1-3 hours by using waste heat to obtain heated aggregate; the heated aggregate is carbonized for 8-24 h under the conditions that the pressure is 0.8-1.2 MPa, the tail gas concentration is larger than or equal to 95%, the temperature is 80-150 DEG C, and the humidity is 20% RH to 100% RH; and screening to obtain the reinforced recycled aggregate. According to the method, fragile residual mortar on the surface of the recycled aggregate falls off through thermal stress generated by the thermal expansion effect, meanwhile, microcracks and pores of the internal residual mortar are expanded, tail gas can enter the microcracks and the pores easily, the carbonization depth is increased, and the aggregate strengthening effect is improved.
本发明属于大宗固体废弃物资源化利用技术领域，提供了一种提升再生骨料碳化深度的加热‑碳化强化方法，包括：利用余热将再生骨料在80℃～120℃下振动加热1～3h，得到加热处理后的骨料；将加热处理后的骨料在压力为0.8～1.2MPa，尾气浓度为≥95％，温度为80～150℃，湿度为20％RH～100％RH的条件下碳化8～24h；筛分，得到强化后的再生骨料。本发明利用热膨胀效应所产生的热应力使再生骨料表面脆弱的残余砂浆脱落，同时，使内部残余砂浆微裂纹与孔隙扩大，利于尾气进入微裂纹与孔隙内部，增加碳化深度，提升骨料强化效果。
Heating-carbonization strengthening method for improving carbonization depth of recycled aggregate
The invention belongs to the technical field of resource utilization of bulk solid wastes, and provides a heating-carbonization strengthening method for improving the carbonization depth of recycled aggregate, which comprises the following steps: vibrating and heating the recycled aggregate at 80-120 DEG C for 1-3 hours by using waste heat to obtain heated aggregate; the heated aggregate is carbonized for 8-24 h under the conditions that the pressure is 0.8-1.2 MPa, the tail gas concentration is larger than or equal to 95%, the temperature is 80-150 DEG C, and the humidity is 20% RH to 100% RH; and screening to obtain the reinforced recycled aggregate. According to the method, fragile residual mortar on the surface of the recycled aggregate falls off through thermal stress generated by the thermal expansion effect, meanwhile, microcracks and pores of the internal residual mortar are expanded, tail gas can enter the microcracks and the pores easily, the carbonization depth is increased, and the aggregate strengthening effect is improved.
本发明属于大宗固体废弃物资源化利用技术领域，提供了一种提升再生骨料碳化深度的加热‑碳化强化方法，包括：利用余热将再生骨料在80℃～120℃下振动加热1～3h，得到加热处理后的骨料；将加热处理后的骨料在压力为0.8～1.2MPa，尾气浓度为≥95％，温度为80～150℃，湿度为20％RH～100％RH的条件下碳化8～24h；筛分，得到强化后的再生骨料。本发明利用热膨胀效应所产生的热应力使再生骨料表面脆弱的残余砂浆脱落，同时，使内部残余砂浆微裂纹与孔隙扩大，利于尾气进入微裂纹与孔隙内部，增加碳化深度，提升骨料强化效果。
Heating-carbonization strengthening method for improving carbonization depth of recycled aggregate
一种提升再生骨料碳化深度的加热-碳化强化方法
LI SHUCAI (Autor:in) / TONG YUFEI (Autor:in) / ZHANG JIAN (Autor:in) / LI ZHAOFENG (Autor:in)
12.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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