A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Admixture-free low-heat cement concrete and preparation method thereof
The invention discloses admixture-free low-heat cement concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is prepared from the following components in parts by weight: 100 to 150 parts of low-heat Portland cement, 750 to 800 parts of artificial sand, 1500 to 1600 parts of gravel, 150 to 170 parts of water, 2 to 5 parts of a water reducing agent, 0.3 to 0.8 part of an air entraining agent, 0.5 to 1 part of sodium tripolyphosphate and 10 to 15 parts of a binding agent, the fineness modulus of the artificial sand is 2.2-2.6, and the content of the stone powder with the particle size smaller than 0.075 mm is 20%-25%. The low-heat Portland cement, the artificial sand with the specific stone powder content, the sodium tripolyphosphate and the binder are adopted, the concrete which does not need admixtures and is low in adiabatic temperature rise, small in dry shrinkage and excellent in crack resistance is obtained, and the problems that admixture resources are deficient, and cracks are likely to appear on the surface of a large-size concrete structure can be solved.
本发明公开一种无掺和料的低热水泥混凝土及其制备方法，属于建筑材料技术领域。所述混凝土包括以下重量份数的各组分：低热硅酸盐水泥100～150份、人工砂750～800份、碎石1500～1600份、水150～170份、减水剂2～5份、引气剂0.3～0.8份、三聚磷酸钠0.5～1份、粘结剂10～15份；所述人工砂的细度模数为2.2～2.6，粒径小于0.075mm的石粉的含量为20％～25％。本发明采用低热硅酸盐水泥、特定石粉含量的人工砂、三聚磷酸钠和粘结剂，获得了一种无需掺和料、绝热温升低、干缩小、抗裂性能优异的混凝土，可解决掺和料资源匮乏、大体积混凝土结构表面易出现裂缝的问题。
Admixture-free low-heat cement concrete and preparation method thereof
The invention discloses admixture-free low-heat cement concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is prepared from the following components in parts by weight: 100 to 150 parts of low-heat Portland cement, 750 to 800 parts of artificial sand, 1500 to 1600 parts of gravel, 150 to 170 parts of water, 2 to 5 parts of a water reducing agent, 0.3 to 0.8 part of an air entraining agent, 0.5 to 1 part of sodium tripolyphosphate and 10 to 15 parts of a binding agent, the fineness modulus of the artificial sand is 2.2-2.6, and the content of the stone powder with the particle size smaller than 0.075 mm is 20%-25%. The low-heat Portland cement, the artificial sand with the specific stone powder content, the sodium tripolyphosphate and the binder are adopted, the concrete which does not need admixtures and is low in adiabatic temperature rise, small in dry shrinkage and excellent in crack resistance is obtained, and the problems that admixture resources are deficient, and cracks are likely to appear on the surface of a large-size concrete structure can be solved.
本发明公开一种无掺和料的低热水泥混凝土及其制备方法，属于建筑材料技术领域。所述混凝土包括以下重量份数的各组分：低热硅酸盐水泥100～150份、人工砂750～800份、碎石1500～1600份、水150～170份、减水剂2～5份、引气剂0.3～0.8份、三聚磷酸钠0.5～1份、粘结剂10～15份；所述人工砂的细度模数为2.2～2.6，粒径小于0.075mm的石粉的含量为20％～25％。本发明采用低热硅酸盐水泥、特定石粉含量的人工砂、三聚磷酸钠和粘结剂，获得了一种无需掺和料、绝热温升低、干缩小、抗裂性能优异的混凝土，可解决掺和料资源匮乏、大体积混凝土结构表面易出现裂缝的问题。
Admixture-free low-heat cement concrete and preparation method thereof
一种无掺和料的低热水泥混凝土及其制备方法
LI JIAZHENG (author) / LI MINGXIA (author) / ZHOU SHIHUA (author) / DONG YUN (author) / SHI YAN (author) / LYU XINGDONG (author) / ZHANG JIANFENG (author) / YAN XIAOHU (author) / ZHANG LIANG (author) / LI YANG (author)
2023-08-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
European Patent Office | 2017
| European Patent Office | 2017
Concrete admixture, preparation method thereof and concrete added with concrete admixture
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