Sulfate-corrosion-resistant cement and cement mortar in marine environment as well as preparation method and application thereof

The invention relates to sulfate-corrosion-resistant cement and cement mortar in a marine environment as well as a preparation method and application thereof. The cement is prepared from the followingraw material components in parts by weight: 25-35 parts of shell lime powder, 15-20 parts of anhydrite and 40-50 parts of calcined ball clay, wherein the calcined ball clay is ball clay subjected tocalcination treatment. The preparation method comprises the following steps: calcining shells, grinding anhydrite and ball clay, calcining the ball clay, and mixing the calcined ball clay with anhydrite and shell lime powder. The problem that in the prior art, a high-pressure jet grouting pile is severely corroded by sulfate in the marine environment, and consequently the foundation reinforcing effect is poor is solved. 本发明涉及一种海洋环境下抗硫酸盐侵蚀的水泥、水泥砂浆及其制备方法和应用。该水泥的原料组分及重量含量如下：贝壳石灰粉25-35份、硬石膏15-20份、煅烧球土40-50份，煅烧球土为经过煅烧处理的球土。制备过程先将贝壳进行煅烧，然后将硬石膏、球土进行粉磨，球土煅烧后，与硬石膏贝壳石灰粉混合。克服了现有技术中高压旋喷桩在海洋环境下硫酸盐侵蚀严重，导致地基加固效果差的问题。