A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Powdery alkali-free accelerator for sprayed concrete in alpine region and preparation method of powdery alkali-free accelerator
The invention provides a powdery alkali-free accelerator for sprayed concrete in alpine regions and a preparation method of the powdery alkali-free accelerator, and belongs to the technical field of concrete admixtures. The alkali-free accelerator is prepared from the following raw materials in parts by weight: 100 to 300 parts of magnesium-aluminum hydrotalcite, 500 to 700 parts of aluminum sulfate, 50 to 100 parts of hydrated calcium silicate, 20 to 80 parts of an early strength component, 1 to 3 parts of a water retention component, 5 to 20 parts of a coagulation accelerating component and 50 to 200 parts of a water absorption component. The powdery alkali-free accelerator disclosed by the invention has a good early strength effect and an excellent coagulation accelerating effect, can greatly improve the early strength of sprayed concrete while reducing the use amount of cement, improves the sprayability of the sprayed concrete, reduces the rebound amount of the concrete, saves the use amount of the concrete, meets the requirement of rapid support, improves the support safety, and has a wide application prospect. The construction progress is accelerated. The method has a wide application prospect in spraying construction of high-speed railway tunnels, water conservancy and hydropower projects and the like in alpine regions.
本发明提出了一种高寒地区喷射混凝土用粉状无碱速凝剂及其制备方法，属于混凝土外加剂技术领域。本发明的无碱速凝剂按重量份数计，包括以下原料：100‑300份镁铝水滑石、500‑700份硫酸铝、50‑100份水化硅酸钙、20‑80份早强组分、1‑3份保水组分、5‑20份促凝组分和50‑200份吸水组分。本发明的粉状无碱速凝剂具有良好的早强效果和优异的促凝作用，在降低水泥用量的同时，可大幅提高喷射混凝土早期强度，同时改善喷射混凝土的可喷性，降低混凝土回弹量，节约混凝土用量，满足快速支护要求，提高支护安全性，加快施工进度。在高寒地区高速铁路隧道、水利水电等工程的喷射施工中具有广泛的应用前景。
Powdery alkali-free accelerator for sprayed concrete in alpine region and preparation method of powdery alkali-free accelerator
The invention provides a powdery alkali-free accelerator for sprayed concrete in alpine regions and a preparation method of the powdery alkali-free accelerator, and belongs to the technical field of concrete admixtures. The alkali-free accelerator is prepared from the following raw materials in parts by weight: 100 to 300 parts of magnesium-aluminum hydrotalcite, 500 to 700 parts of aluminum sulfate, 50 to 100 parts of hydrated calcium silicate, 20 to 80 parts of an early strength component, 1 to 3 parts of a water retention component, 5 to 20 parts of a coagulation accelerating component and 50 to 200 parts of a water absorption component. The powdery alkali-free accelerator disclosed by the invention has a good early strength effect and an excellent coagulation accelerating effect, can greatly improve the early strength of sprayed concrete while reducing the use amount of cement, improves the sprayability of the sprayed concrete, reduces the rebound amount of the concrete, saves the use amount of the concrete, meets the requirement of rapid support, improves the support safety, and has a wide application prospect. The construction progress is accelerated. The method has a wide application prospect in spraying construction of high-speed railway tunnels, water conservancy and hydropower projects and the like in alpine regions.
本发明提出了一种高寒地区喷射混凝土用粉状无碱速凝剂及其制备方法，属于混凝土外加剂技术领域。本发明的无碱速凝剂按重量份数计，包括以下原料：100‑300份镁铝水滑石、500‑700份硫酸铝、50‑100份水化硅酸钙、20‑80份早强组分、1‑3份保水组分、5‑20份促凝组分和50‑200份吸水组分。本发明的粉状无碱速凝剂具有良好的早强效果和优异的促凝作用，在降低水泥用量的同时，可大幅提高喷射混凝土早期强度，同时改善喷射混凝土的可喷性，降低混凝土回弹量，节约混凝土用量，满足快速支护要求，提高支护安全性，加快施工进度。在高寒地区高速铁路隧道、水利水电等工程的喷射施工中具有广泛的应用前景。
Powdery alkali-free accelerator for sprayed concrete in alpine region and preparation method of powdery alkali-free accelerator
一种高寒地区喷射混凝土用粉状无碱速凝剂及其制备方法
LI XIXI (author) / HUANG YUMEI (author) / DONG SHUQIANG (author) / WANG LONGFEI (author) / WU WEI (author) / GONG BIWEI (author) / TIAN YU (author) / LIU XUFEI (author) / ZHANG QI (author) / CHEN SEN (author)
2023-12-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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