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A platform for research: civil engineering, architecture and urbanism
Functional admixture for sprayed concrete as well as preparation method and application of functional admixture
The invention discloses a functional admixture for sprayed concrete and a preparation method and application thereof.The functional admixture for sprayed concrete comprises a first component, a second component and a third component, the first component comprises a high-performance super plasticizer, polyvinyl alcohol and boric acid, and the second component comprises a high-performance super plasticizer, polyvinyl alcohol and boric acid; the second component comprises silica fume, tricalcium silicate clinker, superfine silicon dioxide, magnesium sulfate and sodium silicate, and the third component comprises calcium oxide. The high-performance super plasticizer, the polyvinyl alcohol and the boric acid are adopted for adjusting the workability of the sprayed concrete, the workability of the concrete before spraying is guaranteed, and the rebound rate is reduced; silica fume, tricalcium silicate clinker and superfine silicon dioxide are used as physical excitants to fill cement pores; magnesium sulfate and sodium silicate are used as chemical excitants to improve the early strength of the concrete; calcium oxide is used as an expanding agent to inhibit the cracking risk of concrete, and silica fume can also reduce the hydration temperature rise of concrete and generate a secondary hydration reaction with cement to adjust the long-term durability of concrete.
本发明公开一种喷射混凝土用功能性掺合料及其制备方法和应用，所述喷射混凝土用功能性掺合料包括第一组分、第二组分和第三组分，第一组分包括高性能超塑化剂、聚乙烯醇和硼酸，第二组分包括硅灰、硅酸三钙熟料、超细二氧化硅、硫酸镁、硅酸钠，第三组分包括氧化钙。本发明采用高性能超塑化剂、聚乙烯醇、硼酸调节喷射混凝土的和易性，保证混凝土喷射前的和易性，减少回弹率；采用硅灰、硅酸三钙熟料、超细二氧化硅作为物理激发剂，填充水泥孔隙；采用硫酸镁、硅酸钠作为化学激发剂，提高混凝土早期强度；采用氧化钙作为膨胀剂，抑制混凝土开裂风险，同时硅灰还可以降低混凝土的水化温升，与水泥发生二次水化反应，调节混凝土长期耐久性。
Functional admixture for sprayed concrete as well as preparation method and application of functional admixture
The invention discloses a functional admixture for sprayed concrete and a preparation method and application thereof.The functional admixture for sprayed concrete comprises a first component, a second component and a third component, the first component comprises a high-performance super plasticizer, polyvinyl alcohol and boric acid, and the second component comprises a high-performance super plasticizer, polyvinyl alcohol and boric acid; the second component comprises silica fume, tricalcium silicate clinker, superfine silicon dioxide, magnesium sulfate and sodium silicate, and the third component comprises calcium oxide. The high-performance super plasticizer, the polyvinyl alcohol and the boric acid are adopted for adjusting the workability of the sprayed concrete, the workability of the concrete before spraying is guaranteed, and the rebound rate is reduced; silica fume, tricalcium silicate clinker and superfine silicon dioxide are used as physical excitants to fill cement pores; magnesium sulfate and sodium silicate are used as chemical excitants to improve the early strength of the concrete; calcium oxide is used as an expanding agent to inhibit the cracking risk of concrete, and silica fume can also reduce the hydration temperature rise of concrete and generate a secondary hydration reaction with cement to adjust the long-term durability of concrete.
本发明公开一种喷射混凝土用功能性掺合料及其制备方法和应用，所述喷射混凝土用功能性掺合料包括第一组分、第二组分和第三组分，第一组分包括高性能超塑化剂、聚乙烯醇和硼酸，第二组分包括硅灰、硅酸三钙熟料、超细二氧化硅、硫酸镁、硅酸钠，第三组分包括氧化钙。本发明采用高性能超塑化剂、聚乙烯醇、硼酸调节喷射混凝土的和易性，保证混凝土喷射前的和易性，减少回弹率；采用硅灰、硅酸三钙熟料、超细二氧化硅作为物理激发剂，填充水泥孔隙；采用硫酸镁、硅酸钠作为化学激发剂，提高混凝土早期强度；采用氧化钙作为膨胀剂，抑制混凝土开裂风险，同时硅灰还可以降低混凝土的水化温升，与水泥发生二次水化反应，调节混凝土长期耐久性。
Functional admixture for sprayed concrete as well as preparation method and application of functional admixture
一种喷射混凝土用功能性掺合料及其制备方法和应用
LIANG WEI (author) / WANG WENQIANG (author) / CHEN YUYING (author) / DONG PENG (author) / DENG SONGWEN (author) / WAN HAILUN (author) / XU QING (author) / LI YANG (author) / FAN CHUNDONG (author) / LI QINGCHENG (author)
2022-12-30
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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