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A platform for research: civil engineering, architecture and urbanism
Low-fluidity-loss full-replacement machine-made sand pumping concrete and preparation method thereof
The invention relates to low-liquidity-loss full-replacement machine-made sand pumping concrete and a preparation method thereof. The low-liquidity-loss full-replacement machine-made sand pumping concrete comprises the following components in parts by mass (kg/m < 3 >): 330-400 parts of cement, 100-150 parts of granulated blast-furnace slag powder, 60-120 parts of fly ash, 700-900 parts of machine-made sand, 800-1000 parts of coarse aggregate, 5.6-14 parts of special functional agent, 5.9-10 parts of high-efficiency water reducing agent and 150-170 parts of water. A special functional agent prepared by mixing self-made polyaspartic acid and sodium hexametaphosphate according to the mass ratio of (7: 1)-(10: 1) is adopted, efficient chelation of amino and phosphate radicals on calcium ions in stone powder on the surface of the machine-made sand is achieved, and the high-quality pretreatment requirement of the machine-made sand is met; according to the concrete, the special functional agent is mixed with the high-efficiency water reducing agent, and the unique long-chain molecular structure of the concrete can gradually play a dispersion role in a concrete system, so that the time-dependent fluidity loss of the concrete is reduced, and the working performance of the machine-made sand concrete reaching a construction site is ensured.
本发明涉及一种低流动性损失全取代机制砂泵送混凝土及其制备方法，它各组分按质量比为(kg/m3)：水泥330～400，粒化高炉矿渣粉100～150，粉煤灰60～120，机制砂700～900，粗骨料800～1000，专用功能剂5.6～14，高效减水剂5.9～10，水150～170。它采用由自制聚天冬氨酸和六偏磷酸钠按7:1～10:1质量比混合制备的专用功能剂，实现氨基与磷酸根对机制砂表面石粉中钙离子的高效螯合，满足机制砂高品质预处理需求；该混凝土通过专用功能剂与高效减水剂混合，其独特长链分子结构可在混凝土体系内逐渐发挥分散作用，降低混凝土经时流动性损失，确保到达施工现场的机制砂混凝土的工作性能。
Low-fluidity-loss full-replacement machine-made sand pumping concrete and preparation method thereof
The invention relates to low-liquidity-loss full-replacement machine-made sand pumping concrete and a preparation method thereof. The low-liquidity-loss full-replacement machine-made sand pumping concrete comprises the following components in parts by mass (kg/m < 3 >): 330-400 parts of cement, 100-150 parts of granulated blast-furnace slag powder, 60-120 parts of fly ash, 700-900 parts of machine-made sand, 800-1000 parts of coarse aggregate, 5.6-14 parts of special functional agent, 5.9-10 parts of high-efficiency water reducing agent and 150-170 parts of water. A special functional agent prepared by mixing self-made polyaspartic acid and sodium hexametaphosphate according to the mass ratio of (7: 1)-(10: 1) is adopted, efficient chelation of amino and phosphate radicals on calcium ions in stone powder on the surface of the machine-made sand is achieved, and the high-quality pretreatment requirement of the machine-made sand is met; according to the concrete, the special functional agent is mixed with the high-efficiency water reducing agent, and the unique long-chain molecular structure of the concrete can gradually play a dispersion role in a concrete system, so that the time-dependent fluidity loss of the concrete is reduced, and the working performance of the machine-made sand concrete reaching a construction site is ensured.
本发明涉及一种低流动性损失全取代机制砂泵送混凝土及其制备方法，它各组分按质量比为(kg/m3)：水泥330～400，粒化高炉矿渣粉100～150，粉煤灰60～120，机制砂700～900，粗骨料800～1000，专用功能剂5.6～14，高效减水剂5.9～10，水150～170。它采用由自制聚天冬氨酸和六偏磷酸钠按7:1～10:1质量比混合制备的专用功能剂，实现氨基与磷酸根对机制砂表面石粉中钙离子的高效螯合，满足机制砂高品质预处理需求；该混凝土通过专用功能剂与高效减水剂混合，其独特长链分子结构可在混凝土体系内逐渐发挥分散作用，降低混凝土经时流动性损失，确保到达施工现场的机制砂混凝土的工作性能。
Low-fluidity-loss full-replacement machine-made sand pumping concrete and preparation method thereof
一种低流动性损失全取代机制砂泵送混凝土及其制备方法
XU JUN (author) / ZHAN YIJIAN (author) / WANG SHENGYI (author) / ZHOU YUCHENG (author)
2025-01-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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