A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Phosphogypsum supersulfide slag cement stable layer, phosphogypsum-based cementing material thereof and preparation method of phosphogypsum supersulfide slag cement stable layer
The invention belongs to the technical field of building materials, and particularly relates to a phosphogypsum supersulfide slag cement stable layer. A phosphogypsum-based cementing material used inthe phosphogypsum supersulfide slag cement stable layer accounts for 5% to 15% of the mass of the stable layer. The phosphogypsum-based cementing material comprises the components in percentage by mass: 45% to 55% of wet-ground modified phosphogypsum slurry (based on the effective content of phosphogypsum contained in the phosphogypsum slurry), 40% to 45% of slag powder, and 5% to 10% of Portlandcement, wherein the water-solid ratio is 0.3. The phosphogypsum supersulfide slag cement stable layer is a semi-rigid cement stable layer. The phosphogypsum supersulfide slag cement has a retarding effect, the influence on construction due to premature hardening in the construction process is avoided, the strength also conforms to the high-grade base course pavement compressive strength value specified in JTG/T F20-2015 'Technical Guidelines for Construction of Highway Roadbases', and the 7d unconfined compressive strength is not less than 0.8 MPa; and the 28d strength is not less than 2.5 MPa. The cement stable layer can effectively prolong and delay the construction setting time, and is beneficial to the construction of a pavement base layer.
本发明属于建筑材料技术领域，具体涉及一种过硫磷石膏矿渣水泥稳定层。该过硫磷石膏矿渣水泥稳定层中使用的磷石膏基胶凝材料占稳定层的质量百分比为5%‑15%；所述磷石膏基胶凝材料按质量百分比计配合比为：湿磨改性磷石膏浆料45‑55%（以其中所含磷石膏的有效含量来计）、矿渣粉40%‑45%、硅酸盐水泥5%‑10%，水固比为0.3。该过硫磷石膏矿渣水泥稳定层是一种半刚性水泥稳定层，过硫磷石膏矿渣水泥具有缓凝效果，在施工过程中避免过早硬化而影响施工，强度也符合JTG/T F20‑2015《公路路面基层施工技术细则》中规定的高等级基层路面抗压强度取值，其中7d无侧限抗压强度不小于0.8MPa；28d强度不小于2.5MPa。本发明所述水泥稳定层能有效提高延缓施工凝固时间，有利于路面基层的施工。
Phosphogypsum supersulfide slag cement stable layer, phosphogypsum-based cementing material thereof and preparation method of phosphogypsum supersulfide slag cement stable layer
The invention belongs to the technical field of building materials, and particularly relates to a phosphogypsum supersulfide slag cement stable layer. A phosphogypsum-based cementing material used inthe phosphogypsum supersulfide slag cement stable layer accounts for 5% to 15% of the mass of the stable layer. The phosphogypsum-based cementing material comprises the components in percentage by mass: 45% to 55% of wet-ground modified phosphogypsum slurry (based on the effective content of phosphogypsum contained in the phosphogypsum slurry), 40% to 45% of slag powder, and 5% to 10% of Portlandcement, wherein the water-solid ratio is 0.3. The phosphogypsum supersulfide slag cement stable layer is a semi-rigid cement stable layer. The phosphogypsum supersulfide slag cement has a retarding effect, the influence on construction due to premature hardening in the construction process is avoided, the strength also conforms to the high-grade base course pavement compressive strength value specified in JTG/T F20-2015 'Technical Guidelines for Construction of Highway Roadbases', and the 7d unconfined compressive strength is not less than 0.8 MPa; and the 28d strength is not less than 2.5 MPa. The cement stable layer can effectively prolong and delay the construction setting time, and is beneficial to the construction of a pavement base layer.
本发明属于建筑材料技术领域，具体涉及一种过硫磷石膏矿渣水泥稳定层。该过硫磷石膏矿渣水泥稳定层中使用的磷石膏基胶凝材料占稳定层的质量百分比为5%‑15%；所述磷石膏基胶凝材料按质量百分比计配合比为：湿磨改性磷石膏浆料45‑55%（以其中所含磷石膏的有效含量来计）、矿渣粉40%‑45%、硅酸盐水泥5%‑10%，水固比为0.3。该过硫磷石膏矿渣水泥稳定层是一种半刚性水泥稳定层，过硫磷石膏矿渣水泥具有缓凝效果，在施工过程中避免过早硬化而影响施工，强度也符合JTG/T F20‑2015《公路路面基层施工技术细则》中规定的高等级基层路面抗压强度取值，其中7d无侧限抗压强度不小于0.8MPa；28d强度不小于2.5MPa。本发明所述水泥稳定层能有效提高延缓施工凝固时间，有利于路面基层的施工。
Phosphogypsum supersulfide slag cement stable layer, phosphogypsum-based cementing material thereof and preparation method of phosphogypsum supersulfide slag cement stable layer
一种过硫磷石膏矿渣水泥稳定层及其磷石膏基胶凝材料、制备方法
SHUI ZHONGHE (author) / YAN CHUHAO (author)
2020-10-30
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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