High-strength concrete with fire resistance and burst resistance and preparation method thereof

The invention provides high-strength concrete with fire resistance and burst resistance and a preparation method thereof.The concrete is prepared from, by weight, 20-23 parts of cement, 7.2-7.5 parts of water, 15-18 parts of natural medium sand, 40-42 parts of natural pebble, 11.5-14 parts of glass aggregate, 0.03-0.05 part of polypropylene fibers and 0.5-2.5 parts of steel fibers.According to the high-strength concrete, the optimum added quantity range of the polypropylene fibers and the steel fibers is determined, and on the premise of improving the fire resistance and burst resistance of the high-strength concrete, the use quantity and production cost of the fibers are reduced, and the influence on the strength of the high-strength concrete is reduced. 本发明提供种具有耐火性和防爆裂性的高强混凝土及其制备方法。本发明的混凝土由如下重量份数的原料制成：水泥20?23份，水7.2?7.5份，天然中砂15?18份，天然石子40?42份，玻璃骨料11.5?14份，聚丙烯纤维0.03?0.05份，钢纤维0.5?2.5份。本发明确定了聚丙烯纤维和钢纤维的最佳掺量范围，在提高高强混凝土耐火性和防爆裂性的前提下，降低了纤维使用量和生产成本、减少了对高强混凝土强度的影响。