新型水泥混凝土道路修补剂的制备与施工

摘要

This paper prepares the high early strength magnesium phosphate repair agent on the basis of using MgO,potassium dihydrogen phosphate and borax and adding mineral admixtures and steel slag powders.The crafts-manship process of pavement repair construction was put forward and applied to practical engineering.Using fly ash, silica fume,slag powders and chromium slag powders to replace partial magnesium phosphate cement,which reduces the cost and saves resources for heavy metal solidification.The engineering application shows:the initial fluidity and setting time can be controlled with less early strength loss.Thecrack permeability is better to meet the required con-struction indicators.%采用氧化镁、磷镁酸盐和硼砂为主，添加部分矿物掺和料和钢渣粉等，制备了快硬早强磷镁酸盐快硬水泥修补剂，提出了路面修补施工工艺，并应用到了实际工程中。利用矿物掺和料(粉煤灰、硅灰、膨胀剂、钢渣粉等)和铬铁矿渣粉替代部分磷镁酸盐水泥，降低了修补剂成本，节约了资源，同时有利于重金属的固化。工程应用表明：在早期强度损失率低的情况下，该修补剂的初始流动度大，凝结时间可调控，早强强度等级高，抗裂抗渗好，满足施工设计指标要求。