铝酸盐水泥基水下灌浆材料的制备及性能表征

On the Preparation and the Performance Characterization of the Aluminate-Cement-Based Material for Underwater Grouting

为解决水下灌浆材料的抗分散性差、流动性差、早期强度低等施工技术难题,通过铝酸盐水泥、普通硅酸盐水泥及二水石膏三元胶凝体系的砂浆及混凝土的流动性、抗分散性及抗压强度试验,确定了最佳絮凝剂为UWB-Ⅱ型絮凝剂、最佳掺量为胶凝材料的2.5%,葡萄糖酸钠缓凝剂的最佳掺量为胶凝材料的1‰,最终制备出快硬、早强、易于施工的水下灌浆材料,并应用于兴泉铁路六角宫水库中桥承台及桩基在深水斜岩地区水下灌注浆施工中,效果良好,可为同类工程提供借鉴。

In order to solve the technical difficulties in construction,such as poor dispersion resistance,poor fluidity and low early strength of the materials for underwater grouting,tests are performed of the fluidity,anti-dispersion and compressive strength of mortar and concrete composed of aluminate cement,ordinary portland cement and dihydrate gypsum ternary cementitious system,upon the basis of which it is determined that the best flocculant is UWB-Ⅱflocculant,and the optimal dosage is 2.5%of cementing material;the best dosage of sodium gluconate retarder is 1‰of cementing material,according to which the quick-hardening,early-strengthened underwater grouting material is finally prepared,which is easy to use for construction,and is already successfully applied to the bridge caps of the Liujiaogong Reservoir and the underwater grouting construction of the pile foundation for Xingquan Railway.The effect of the underwater grouting material for the underwater grouted projects is good,which may provide a useful reference for other projects of the same type.