A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a phosphogypsum cement retarder. The phosphogypsum cement retarder comprises, by weight, 40-60 parts of phosphogypsum, 5-8 parts of lime powder, 2.0-3.0 parts of a silane coupling agent, 10-15 parts of modified diatomite and 3-5 parts of water. The defects in the prior art are overcome, the modified diatomite in the cement retarder can adsorb the coupling agent, the coupling agent has an enhancing effect on adsorption of soluble phosphorus and fluorine by the modified diatomite, and the modified diatomite can react with the soluble phosphorus and fluorine to reduce thecontent of the soluble phosphorus and fluorine in the cement retarder; and additionally, the modified diatomite enhances the flexural strength and compressive strength of the cement when the cement retarder is used for Portland cement.
本发明公开了一种磷石膏水泥缓凝剂，包括如下重量份的原料，磷石膏40～60份、石灰粉5～8份、硅烷偶联剂2.0～3.0份、改性硅藻土10～15份和3～5份水，本发明克服了现有技术的不足，本发明的水泥缓凝剂中的改性硅藻土可对偶联剂进行吸附，偶联剂对改性硅藻土对可溶性磷、氟的吸附具有增强作用，且改性硅藻土可与可溶性磷、氟进行反应，降低了水泥缓凝剂中可溶性磷、氟的含量；另外，改性硅藻土增强了该水泥缓凝剂用于硅酸盐水泥时的水泥的抗折强度和抗压强度。
The invention discloses a phosphogypsum cement retarder. The phosphogypsum cement retarder comprises, by weight, 40-60 parts of phosphogypsum, 5-8 parts of lime powder, 2.0-3.0 parts of a silane coupling agent, 10-15 parts of modified diatomite and 3-5 parts of water. The defects in the prior art are overcome, the modified diatomite in the cement retarder can adsorb the coupling agent, the coupling agent has an enhancing effect on adsorption of soluble phosphorus and fluorine by the modified diatomite, and the modified diatomite can react with the soluble phosphorus and fluorine to reduce thecontent of the soluble phosphorus and fluorine in the cement retarder; and additionally, the modified diatomite enhances the flexural strength and compressive strength of the cement when the cement retarder is used for Portland cement.
本发明公开了一种磷石膏水泥缓凝剂，包括如下重量份的原料，磷石膏40～60份、石灰粉5～8份、硅烷偶联剂2.0～3.0份、改性硅藻土10～15份和3～5份水，本发明克服了现有技术的不足，本发明的水泥缓凝剂中的改性硅藻土可对偶联剂进行吸附，偶联剂对改性硅藻土对可溶性磷、氟的吸附具有增强作用，且改性硅藻土可与可溶性磷、氟进行反应，降低了水泥缓凝剂中可溶性磷、氟的含量；另外，改性硅藻土增强了该水泥缓凝剂用于硅酸盐水泥时的水泥的抗折强度和抗压强度。
| European Patent Office | 2023
Phosphogypsum as set retarder in Portland cement
| British Library Online Contents | 1995
Utilization of weathered phosphogypsum as set retarder in Portland cement
| Online Contents | 2004
Utilization of weathered phosphogypsum as set retarder in Portland cement
| Tema Archive | 2004