Comparative study on the performance of synthetic hydraulic lime under different curing conditions

ZHANG Shaoyun; SUN Manli; LI Zhipeng

doi:10.16152/j.cnki.xdxbzr.2026-02-012

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Comparative study on the performance of synthetic hydraulic lime under different curing conditions

Cultural heritage conservation | 更新时间：2026-05-11

- Comparative study on the performance of synthetic hydraulic lime under different curing conditions
- Journal of Northwest University (Natural Science Edition) Vol. 56, Issue 2, Pages: 350-360(2026)
- 作者机构：
  
  1.西北民族大学　历史文化学院，甘肃　兰州　730030
  2.西北大学　文化遗产学院，陕西　西安　710127
  3.敦煌研究院　文物保护技术服务中心，甘肃　兰州　730000
- 作者简介：
- 基金信息：
- DOI：10.16152/j.cnki.xdxbzr.2026-02-012
  CLC： K234.2
- Received：15 December 2025，
  
  Revised：2026-02-10，
  
  Published：25 April 2026
- 稿件说明：
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ZHANG Shaoyun, SUN Manli, LI Zhipeng. Comparative study on the performance of synthetic hydraulic lime under different curing conditions[J]. Journal of Northwest University (Natural Science Edition), 2026, 56(2): 350-360.
DOI：

ZHANG Shaoyun, SUN Manli, LI Zhipeng. Comparative study on the performance of synthetic hydraulic lime under different curing conditions[J]. Journal of Northwest University (Natural Science Edition), 2026, 56(2): 350-360. DOI： 10.16152/j.cnki.xdxbzr.2026-02-012.

摘要

水硬性石灰因其可持续性与材料相容性优势，近年来在建筑与文物保护领域受到关注，然而，因早期强度增长缓慢，限制了其在快速加固场景中的应用。以钾长石与石灰石共同煅烧制备的合成水硬性石灰K3为对象，在标准养护与加速碳化养护条件下，对比分析砂浆试件的收缩率、孔隙率、力学性能、弹性波速以及物相与微观结构演变规律。结果表明，加速碳化可显著改变K3的反应进程，28 d时试件孔隙率较标准养护降低约9.7%，抗折和抗压强度分别提高至3.20 MPa和12.54 MPa，弹性波速整体升高，反映出内部结构连续性与强度的增加。TG-DSC与SEM显示，碳化环境促进了Ca（OH）

的快速消耗和大量CaCO

的沉积，形成由CaCO

与C-S-H协同构建的致密复合骨架结构。研究表明，通过合理调控养护环境即可推动合成水硬性石灰实现早期强度与结构稳定性的显著提升，为石质文物和历史建筑遗存的快速加固与修复提供了可行路径。

Abstract

Hydraulic lime has attracted growing interest in building and cultural heritage conservation because of its sustainability and good compatibility with original substrates. Its slow early strength development

however

restricts its use in situations where rapid consolidation is required. In this study

a synthetic hydraulic lime (K3) obtained by co-calcination of potassium feldspar and limestone was subjected to standard curing and accelerated carbonation curing

and the drying shrinkage

porosity

mechanical properties

ultrasonic pulse velocity

as well as phase assemblage and microstructural evolution of mortar specimens were compared. The results show that accelerated carbonation markedly alters the reaction process of K3: At the 28th day

porosity is reduced by about 9.7% relative to standard curing

while flexural and compressive strengths increase to 3.20 MPa and 12.54 MPa

respectively. The overall increas

e in ultrasonic pulse velocity indicates improved internal structural continuity and stiffness. TG-DSC and SEM observations further show that the carbonation environment promotes rapid consumption of Ca(OH)

and substantial precipitation of CaCO

leading to a dense composite skeleton formed jointly by CaCO

and C-S-H. Taken together

the results suggest that appropriate control of the CO

curing environment can significantly enhance the early strength and structural stability of synthetic hydraulic lime

providing a practical option for the rapid consolidation and repair of stone relics and historic masonry structures.

关键词

Keywords

references

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