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A platform for research: civil engineering, architecture and urbanism
Magnesian expanding agent shrinkage-compensating concrete and preparation method thereof
The invention discloses magnesium expanding agent shrinkage-compensating concrete and a preparation method thereof. The concrete is prepared from the following raw materials in parts by weight: 210 to 230 parts of cement, 100 to 130 parts of magnesium shrinkage-compensating agent, 1800 to 2200 parts of aggregate and 120 to 150 parts of water, the magnesium shrinkage compensating agent is composed of fly ash, magnesium oxide and a water reducing agent, and the aggregate is composed of siliceous rock artificial sand and dolomite macadam. According to the invention, the magnesium shrinkage-compensating agent is adopted to replace a part of a cementing material to mix the concrete, and the magnesium shrinkage-compensating agent is added to inhibit the cracking of the concrete, improve the durability of the concrete and solve the problem of dam cracking; the limit mixing amount of MgO can be increased by externally mixing the fly ash and the water reducing agent, and the expansion amount is controlled by continuously adjusting the mixing amount of MgO, so that the optimal expansion effect is achieved, and the mechanical performance, the construction performance and the like of the concrete are improved.
本发明公开了一种镁质膨胀剂补偿收缩混凝土及其制备方法，所述混凝土由以下重量份数的原料制备而成：水泥210‑230份、镁质补偿收缩剂100‑130份、骨料1800‑2200份和水120‑150份；所述镁质补偿收缩剂由粉煤灰、氧化镁和减水剂组成，所述骨料由硅质岩人工砂和白云岩碎石组成。本发明是采用镁质补偿收缩剂代替部分的胶凝材料拌制混凝土，加入镁质补偿收缩剂可以抑制混凝土开裂，提高混凝土的耐久性，解决大坝开裂的问题；并通过外掺粉煤灰和减水剂的方式可提高MgO的极限掺量，不断调节MgO的掺量来控制膨胀量，达到最佳的膨胀效果，从而提高混凝土力学，施工等性能。
Magnesian expanding agent shrinkage-compensating concrete and preparation method thereof
The invention discloses magnesium expanding agent shrinkage-compensating concrete and a preparation method thereof. The concrete is prepared from the following raw materials in parts by weight: 210 to 230 parts of cement, 100 to 130 parts of magnesium shrinkage-compensating agent, 1800 to 2200 parts of aggregate and 120 to 150 parts of water, the magnesium shrinkage compensating agent is composed of fly ash, magnesium oxide and a water reducing agent, and the aggregate is composed of siliceous rock artificial sand and dolomite macadam. According to the invention, the magnesium shrinkage-compensating agent is adopted to replace a part of a cementing material to mix the concrete, and the magnesium shrinkage-compensating agent is added to inhibit the cracking of the concrete, improve the durability of the concrete and solve the problem of dam cracking; the limit mixing amount of MgO can be increased by externally mixing the fly ash and the water reducing agent, and the expansion amount is controlled by continuously adjusting the mixing amount of MgO, so that the optimal expansion effect is achieved, and the mechanical performance, the construction performance and the like of the concrete are improved.
本发明公开了一种镁质膨胀剂补偿收缩混凝土及其制备方法，所述混凝土由以下重量份数的原料制备而成：水泥210‑230份、镁质补偿收缩剂100‑130份、骨料1800‑2200份和水120‑150份；所述镁质补偿收缩剂由粉煤灰、氧化镁和减水剂组成，所述骨料由硅质岩人工砂和白云岩碎石组成。本发明是采用镁质补偿收缩剂代替部分的胶凝材料拌制混凝土，加入镁质补偿收缩剂可以抑制混凝土开裂，提高混凝土的耐久性，解决大坝开裂的问题；并通过外掺粉煤灰和减水剂的方式可提高MgO的极限掺量，不断调节MgO的掺量来控制膨胀量，达到最佳的膨胀效果，从而提高混凝土力学，施工等性能。
Magnesian expanding agent shrinkage-compensating concrete and preparation method thereof
一种镁质膨胀剂补偿收缩混凝土及其制备方法
CHEN JIANGUO (author) / DU JIAXING (author) / HUANG KAI (author) / LIU LUQIANG (author) / HUANG ZHUOJIE (author) / HUANG XIAOBING (author) / GAN FU (author) / ZHU FANGTAN (author) / CHEN MEIQIN (author) / PAN CHENG (author)
2022-05-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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