| 尹佳芝,林永权,邓 恺.低温条件下水泥早强性能提升方法探究[J].水泥工程,2025,38(3):42-46 |
| 低温条件下水泥早强性能提升方法探究 |
| Study on methods to enhance early strength of cement under low-temperature conditions |
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| DOI： |
| 中文关键词: 早强剂 水泥早期强度 低温条件 高标号水泥 |
| 英文关键词: early-strength agents cement early strength low-temperature condition high-grade cement |
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| 中文摘要: |
| 装配式建筑的快速发展，对低温条件下的混凝土早强有了巨大需求。本文研究了使用不同水泥品种，降低水泥细度，使用单一或复合早强剂等方法，对低温（10 ℃）条件下水泥早强性能的影响，从而探究低温条件下实现水泥早强的方法。结果表明，使用高标号水泥，并适当降低水泥细度，然后搭配使用纳米水化硅酸钙（C-S-H）晶核剂，可以大幅提高水泥的早期强度。在10 ℃条件下，使用比表面积为462 m2/kg的P·Ⅱ 52.5R水泥，并搭配使用1%掺量的纳米晶核剂，则水泥胶砂强度可在6 h内达到10.7 MPa，相比空白控制样，强度提高10.7 MPa，强度达到10 MPa的时间至少提前10 h。 |
| 英文摘要: |
| The rapid development of prefabricated buildings has created a significant demand for early-strength concrete under low-temperature conditions. This study investigates the effects of different cement types, reduced cement fineness, and the use of single or composite early-strength agents on the early strength of cement at low temperatures (10 ℃), aiming to explore the methods for achieving early strength of cement under low temperature conditions. The results indicate that using high-grade cement with appropriately reduced fineness, combined with nano calcium silicate hydrate (C-S-H) nucleation seeds, can significantly enhance the early strength of cement. At 10 ℃, when P·Ⅱ 52.5R cement with a specific surface area of 462 m²/kg is used along with 1% nano nucleation seeds, the cement mortar strength can reach 10.7 MPa within 6 hours—an increase of 10.7 MPa compared to the blank control sample. Additionally, the time required to achieve 10 MPa strength is reduced by at least 10 h. |
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