A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modified aluminate cement as well as preparation method and application thereof
The invention provides modified aluminate cement as well as a preparation method and application thereof. The cement-based composite material comprises the following raw materials in percentage by mass: 90% of aluminate cement, 10% of fluorgypsum and KH2PO4 accounting for 0.1-0.4% of the total mass of the raw materials. According to the invention, fluorgypsum and KH2PO4 are adopted to regulate and control the setting time and compressive strength of aluminate cement. Results show that 10wt% of fluorgypsum promotes generation of ettringite, 0.2 wt% of KH2PO4 further optimizes generation of ettringite, hydration products and pore structures of the calcium aluminate cement are optimized through doping of fluorgypsum and KH2PO4, and particularly, KH2PO4 enables the ettringite to change from a needle shape to a fiber shape. Wherein the initial setting time and the final setting time are respectively shortened by 39% and 38%; and the 3d compressive strength and the 28d compressive strength are respectively increased by 76% and 228.80%. The method has a good reference effect on performance regulation and control of the aluminate cement grouting material.
本发明提供一种改性铝酸盐水泥及其制备方法和应用。按质量百分比计，其原料组成包括铝酸盐水泥90％和氟石膏10％，以及上述原料总质量0.1‑0.4％的KH2PO4。本发明采用氟石膏和KH2PO4对铝酸盐水泥的凝结时间和抗压强度进行了调控。结果表明，10wt％的氟石膏促成了钙矾石的生成，0.2wt％KH2PO4进一步优化了钙矾石的生成，二者的掺入均优化铝酸钙水泥的水化产物和孔结构，尤其是KH2PO4使钙矾石的形貌由针状变为纤维状。其中，初凝时间和终凝时间分别缩短了39％和38％；3d和28d抗压强度分别增大了76％和228.80％。这对铝酸盐水泥注浆材料的性能调控具有较好的参考作用。
Modified aluminate cement as well as preparation method and application thereof
The invention provides modified aluminate cement as well as a preparation method and application thereof. The cement-based composite material comprises the following raw materials in percentage by mass: 90% of aluminate cement, 10% of fluorgypsum and KH2PO4 accounting for 0.1-0.4% of the total mass of the raw materials. According to the invention, fluorgypsum and KH2PO4 are adopted to regulate and control the setting time and compressive strength of aluminate cement. Results show that 10wt% of fluorgypsum promotes generation of ettringite, 0.2 wt% of KH2PO4 further optimizes generation of ettringite, hydration products and pore structures of the calcium aluminate cement are optimized through doping of fluorgypsum and KH2PO4, and particularly, KH2PO4 enables the ettringite to change from a needle shape to a fiber shape. Wherein the initial setting time and the final setting time are respectively shortened by 39% and 38%; and the 3d compressive strength and the 28d compressive strength are respectively increased by 76% and 228.80%. The method has a good reference effect on performance regulation and control of the aluminate cement grouting material.
本发明提供一种改性铝酸盐水泥及其制备方法和应用。按质量百分比计，其原料组成包括铝酸盐水泥90％和氟石膏10％，以及上述原料总质量0.1‑0.4％的KH2PO4。本发明采用氟石膏和KH2PO4对铝酸盐水泥的凝结时间和抗压强度进行了调控。结果表明，10wt％的氟石膏促成了钙矾石的生成，0.2wt％KH2PO4进一步优化了钙矾石的生成，二者的掺入均优化铝酸钙水泥的水化产物和孔结构，尤其是KH2PO4使钙矾石的形貌由针状变为纤维状。其中，初凝时间和终凝时间分别缩短了39％和38％；3d和28d抗压强度分别增大了76％和228.80％。这对铝酸盐水泥注浆材料的性能调控具有较好的参考作用。
Modified aluminate cement as well as preparation method and application thereof
一种改性铝酸盐水泥及其制备方法和应用
WANG YULI (author) / BAO LINYU (author) / TANG HUIYU (author) / SUN GUOWEN (author) / QIN YUJIE (author)
2024-02-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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