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Special composite cementing material for preparing low-shrinkage ultrahigh performance concrete
The invention relates to a special composite cementing material for preparing low-shrinkage ultrahigh performance concrete. The special composite cementing material is prepared by uniformly dry-mixingthe following raw materials in parts by weight: 75-85 parts of Portland cement clinker powder; 10 to 20 parts of expansive high-belite sulphoaluminate cement clinker powder and 5-10 parts of anhydrite powder. The preparation parameters of the expansible high-belite sulphoaluminate cement clinker are as follows: the alkalinity coefficient Cm value is 1.4-1.6, the fCaO content is 5-8%, and the fSO3content is 7-10%; and the expansible high-belite sulphoaluminate cement clinker comprises the following components in percentage by weight: 40 to 50% of C2S, 25 to 35% of C4A3S, 4 to 5% of C12A7, 10to 15% of CaSO4, 4 to 8% of fCaO and 1 to 2% of C4AF. According to the special composite cementing material disclosed by the invention, the 3d self-shrinkage value of neat paste is 350-380ppm, and thecompressive strength of each age is improved by 2-4Mpa; the shrinkage value of the UHPC can be reduced, and the strength and stability of the UHPC can be improved.
本发明涉及一种用于制备低收缩超高性能混凝土的专用复合胶凝材料，由如下重量份原料干混均匀得到：硅酸盐水泥熟料粉75～85份；膨胀性高贝利特硫铝酸盐水泥熟料粉10～20份；硬石膏粉5～10份。膨胀性高贝利特硫铝酸盐水泥熟料的配料参数为：碱度系数Cm值为1.4～1.6，fCaO为5～8％，fSO为7～10％；重量百分比的矿物组成：CS为40～50％，CAS为25～35％，CA为4～5％，CaSO为10～15％，fCaO为4～8％，CAF为1～2％。本发明专用复合胶凝材料，净浆3d自收缩值350‑380ppm，各龄期抗压强度提高了2‑4Mpa；既可降低UHPC收缩值，还可提高其强度和稳定性。
Special composite cementing material for preparing low-shrinkage ultrahigh performance concrete
The invention relates to a special composite cementing material for preparing low-shrinkage ultrahigh performance concrete. The special composite cementing material is prepared by uniformly dry-mixingthe following raw materials in parts by weight: 75-85 parts of Portland cement clinker powder; 10 to 20 parts of expansive high-belite sulphoaluminate cement clinker powder and 5-10 parts of anhydrite powder. The preparation parameters of the expansible high-belite sulphoaluminate cement clinker are as follows: the alkalinity coefficient Cm value is 1.4-1.6, the fCaO content is 5-8%, and the fSO3content is 7-10%; and the expansible high-belite sulphoaluminate cement clinker comprises the following components in percentage by weight: 40 to 50% of C2S, 25 to 35% of C4A3S, 4 to 5% of C12A7, 10to 15% of CaSO4, 4 to 8% of fCaO and 1 to 2% of C4AF. According to the special composite cementing material disclosed by the invention, the 3d self-shrinkage value of neat paste is 350-380ppm, and thecompressive strength of each age is improved by 2-4Mpa; the shrinkage value of the UHPC can be reduced, and the strength and stability of the UHPC can be improved.
本发明涉及一种用于制备低收缩超高性能混凝土的专用复合胶凝材料，由如下重量份原料干混均匀得到：硅酸盐水泥熟料粉75～85份；膨胀性高贝利特硫铝酸盐水泥熟料粉10～20份；硬石膏粉5～10份。膨胀性高贝利特硫铝酸盐水泥熟料的配料参数为：碱度系数Cm值为1.4～1.6，fCaO为5～8％，fSO为7～10％；重量百分比的矿物组成：CS为40～50％，CAS为25～35％，CA为4～5％，CaSO为10～15％，fCaO为4～8％，CAF为1～2％。本发明专用复合胶凝材料，净浆3d自收缩值350‑380ppm，各龄期抗压强度提高了2‑4Mpa；既可降低UHPC收缩值，还可提高其强度和稳定性。
Special composite cementing material for preparing low-shrinkage ultrahigh performance concrete
一种用于制备低收缩超高性能混凝土的专用复合胶凝材料
YAO PIQIANG (author) / ZHAO YANYAN (author)
2020-07-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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