Shrinkage-compensating concrete and preparation method thereof: Fid-Bau Portal

Shrinkage-compensating concrete and preparation method thereof

LIU PEIYIN / LIU ZHIQIANG / TANG RONG / BAI QINQIN / ZHOU JIE

The invention relates to the technical field of building materials, and discloses shrinkage-compensating concrete and a preparation method thereof.The shrinkage-compensating concrete is prepared from a gel material, aggregate, a composite expanding agent, an additive, an expansion promoting and reinforcing agent, rubber particles, water and a hydration heat inhibitor, and the gel material is prepared from cement, fly ash, mineral powder, silica fume and super absorbent resin; the aggregate comprises the following raw materials: quartz powder, quartz sand and crushed and recycled aggregate, and the composite expanding agent comprises the following raw materials: magnesium oxide, zeolite powder, siderite ore powder and steel fiber. According to the shrinkage-compensating concrete and the preparation method thereof, the water-binder ratio is reduced and the strength is improved by doping the siderite ore powder and using the efficient water reducing agent; the toughness of the shrinkage-compensating concrete is improved by doping a large amount of steel fibers, so that the shrinkage-compensating concrete has the characteristics of micro-expansion, low shrinkage, high strength and high toughness, and by adding the recycled coarse aggregate, the shrinkage-compensating concrete is used as a green building material, so that the reutilization of resources is realized.

本发明涉及建筑材料技术领域，公开了一种补偿收缩混凝土及其制备方法，包括以下原料：凝胶材料，骨料，复合膨胀剂，外加剂，膨胀促进增强剂，橡胶颗粒，水，水化热抑制剂，所述凝胶材料包括以下原料：水泥，粉煤灰，矿粉，硅灰，高吸水性树脂，所述骨料包括以下原料：石英粉，石英砂，碎以及再生骨料，所述复合膨胀剂包括以下原料：氧化镁，沸石粉，菱铁矿石粉，钢纤维。该补偿收缩混凝土及其制备方法，通过掺入菱铁矿石粉、使用高效减水剂降低水胶比提高强度；通过掺入大量钢纤维提高其韧性，使得该补偿收缩混凝土具有微膨胀低收缩、高强、高韧的特点，通过添加再生粗骨料，作为绿色建筑材料，实现了资源的再利用。

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