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A platform for research: civil engineering, architecture and urbanism
Airtight machine-made sand concrete and preparation method thereof
The invention relates to the technical field of buildings, and provides airtight machine-made sand concrete and a preparation method thereof. The concrete is prepared from the following raw materials: machine-made sand, broken stones, cement, a powder admixture and a special admixture, wherein the powder admixture is mainly composed of silica fume, fly ash, an expanding agent, stone powder and a powder water reducing agent; the special admixture is mainly composed of a polycarboxylic acid water reducing agent, a retarder, an air entraining agent, a defoaming agent, a foam stabilizer and water; the construction workability and the air tightness of the airtight machine-made sand concrete are remarkably improved, the powder admixture and the special additive are synergistically matched, so that the obtained airtight machine-made sand concrete is small in air loss, stable in mechanical property and low in air permeability coefficient, the system does not depend on a high-cost airtight agent, and the air permeability coefficient of the airtight machine-made sand concrete is greatly improved. The brand-new airtight machine-made sand concrete is provided, is particularly suitable for being applied to tunnels, and has very important technical significance.
本发明涉及建筑技术领域，提供一种气密性机制砂混凝土及其制备方法，制备所述混凝土的原料中包括机制砂、碎石、水泥、主要由硅灰、粉煤灰、膨胀剂、石粉和粉体减水剂构成的粉体掺和料和主要由聚羧酸减水剂、缓凝剂、引气剂、消泡剂、稳泡剂和水构成的专用外加剂时，该气密性机制砂混凝土的施工和易性和气密性均显著提升，其中的粉体掺和料和专用外加剂的协同配合，使所得气密性机制砂混凝土的气损小、力学性能稳定且透气系数低，该体系中不依赖于高成本的气密剂，提供了一种全新的气密性机制砂混凝土，特别适用于在隧道中应用，具有十分重要的技术意义。
Airtight machine-made sand concrete and preparation method thereof
The invention relates to the technical field of buildings, and provides airtight machine-made sand concrete and a preparation method thereof. The concrete is prepared from the following raw materials: machine-made sand, broken stones, cement, a powder admixture and a special admixture, wherein the powder admixture is mainly composed of silica fume, fly ash, an expanding agent, stone powder and a powder water reducing agent; the special admixture is mainly composed of a polycarboxylic acid water reducing agent, a retarder, an air entraining agent, a defoaming agent, a foam stabilizer and water; the construction workability and the air tightness of the airtight machine-made sand concrete are remarkably improved, the powder admixture and the special additive are synergistically matched, so that the obtained airtight machine-made sand concrete is small in air loss, stable in mechanical property and low in air permeability coefficient, the system does not depend on a high-cost airtight agent, and the air permeability coefficient of the airtight machine-made sand concrete is greatly improved. The brand-new airtight machine-made sand concrete is provided, is particularly suitable for being applied to tunnels, and has very important technical significance.
本发明涉及建筑技术领域，提供一种气密性机制砂混凝土及其制备方法，制备所述混凝土的原料中包括机制砂、碎石、水泥、主要由硅灰、粉煤灰、膨胀剂、石粉和粉体减水剂构成的粉体掺和料和主要由聚羧酸减水剂、缓凝剂、引气剂、消泡剂、稳泡剂和水构成的专用外加剂时，该气密性机制砂混凝土的施工和易性和气密性均显著提升，其中的粉体掺和料和专用外加剂的协同配合，使所得气密性机制砂混凝土的气损小、力学性能稳定且透气系数低，该体系中不依赖于高成本的气密剂，提供了一种全新的气密性机制砂混凝土，特别适用于在隧道中应用，具有十分重要的技术意义。
Airtight machine-made sand concrete and preparation method thereof
一种气密性机制砂混凝土及其制备方法
ZHAO YUXIANG (author) / KANG WANG (author) / HUANG TIANYONG (author) / ZHANG HAILONG (author) / LI YANG (author) / LI SHA (author) / QIU JUNFU (author) / ZHANG RUIFENG (author)
2024-02-06
Patent
Electronic Resource
Chinese
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