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Admixture for shotcrete and preparation method and application thereof
The invention relates to the technical field of shotcrete, in particular to an admixture for shotcrete and a preparation method and application thereof. Mineral composite powder is subjected to raw material component and a raw material ratio control, and the admixture is prepared from the mineral composite powder, a tackifier, a hydrophilic agent, an air entraining agent and a thickening agent. The admixture is added into shotcrete raw material preparation according to the mass ratio of 4-8% of the total amount of a cementing material, the comprehensive performance of shotcrete is improved, the hanging property, strength and durability of the shotcrete are improved, the setting time of the shotcrete is within 2 min, the plastic viscosity reaches 5.8 Pa.s or above, the spraying rebound rateis lower than 4%, the one-time spraying thickness reaches 30 cm or above, the compressive strength (28d) reaches 40-60 MPa, and the bonding strength (28d) reaches 2.4 MPa or above.
本发明涉及喷射混凝土技术领域，尤其是一种喷射混凝土用掺合料及其制备方法和应用，经矿物复合粉原料成分以及原料配比的控制，将其与增粘剂、亲水剂、引气剂、增稠剂配制成掺合料，将该掺合料按照占胶凝材料总量4‑8％的质量比添加到喷射混凝土原料配制中，改善了喷射混凝土的综合性能，改善了喷射混凝土的垂挂性、强度以及耐久性，使得喷射混凝土的凝结时间达到了2min以内，塑性粘度达到了5.8Pa·s以上，喷射回弹率低于4％，一次性喷射厚度达到了30cm以上，抗压强度28d达40‑60MPa，粘结强度28d达到了2.4MPa以上。
Admixture for shotcrete and preparation method and application thereof
The invention relates to the technical field of shotcrete, in particular to an admixture for shotcrete and a preparation method and application thereof. Mineral composite powder is subjected to raw material component and a raw material ratio control, and the admixture is prepared from the mineral composite powder, a tackifier, a hydrophilic agent, an air entraining agent and a thickening agent. The admixture is added into shotcrete raw material preparation according to the mass ratio of 4-8% of the total amount of a cementing material, the comprehensive performance of shotcrete is improved, the hanging property, strength and durability of the shotcrete are improved, the setting time of the shotcrete is within 2 min, the plastic viscosity reaches 5.8 Pa.s or above, the spraying rebound rateis lower than 4%, the one-time spraying thickness reaches 30 cm or above, the compressive strength (28d) reaches 40-60 MPa, and the bonding strength (28d) reaches 2.4 MPa or above.
本发明涉及喷射混凝土技术领域，尤其是一种喷射混凝土用掺合料及其制备方法和应用，经矿物复合粉原料成分以及原料配比的控制，将其与增粘剂、亲水剂、引气剂、增稠剂配制成掺合料，将该掺合料按照占胶凝材料总量4‑8％的质量比添加到喷射混凝土原料配制中，改善了喷射混凝土的综合性能，改善了喷射混凝土的垂挂性、强度以及耐久性，使得喷射混凝土的凝结时间达到了2min以内，塑性粘度达到了5.8Pa·s以上，喷射回弹率低于4％，一次性喷射厚度达到了30cm以上，抗压强度28d达40‑60MPa，粘结强度28d达到了2.4MPa以上。
Admixture for shotcrete and preparation method and application thereof
一种喷射混凝土用掺合料及其制备方法和应用
ZHAO YUAN (author) / WANG YONG (author) / ZHAO HELING (author) / WANG RUOXUN (author)
2020-12-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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