硅酸盐学报

水泥-矿渣复合胶凝材料硬化浆体的微观结构

作者：刘仍光1 2 丁士东1 阎培渝3

单位：1. 中国石化石油工程技术研究院北京 100101 2. 中国石油大学北京北京102249 3. 清华大学土木工程系北京100084

分类号：TU528.042.2

出版年,卷(期):页码：2015,43(5):610-618

DOI：10.14062/j.issn.0454-5648.2015.05.10

摘要：

利用压汞法、扫描电子显微镜和透射电子显微镜研究了两种不同养护条件下水泥-矿渣复合胶凝材料硬化浆体的微观结构。结果表明：常温养护3 d 龄期时，随着矿渣的掺入和掺量的增加，硬化浆体的孔隙率越大，大孔含量越多；硬化浆体微观形貌显示，掺矿渣试样的反应程度比纯水泥试样更低，密实程度较差。水化后期，复合胶凝材料的水化程度虽然比纯水泥试样低，但复合试样的孔隙率更低，孔径细化。纯水泥试样中水化硅酸钙(C-S-H)凝胶的微观形貌呈单向分布的纤维状，而复合胶凝材料试样中矿渣反应生成的C-S-H 凝胶呈三维分布的箔片状，能更有效的隔断和填充连通的孔隙。在高温养护条件下，掺矿渣复合胶凝材料硬化浆体早期和后期孔隙率均较低，高温激发了矿渣早期的活性。

The microstructure of hardened Portland cement-slag complex binder pastes cured under two different curing conditions

was investigated by mercury intrusion porosimetry, scanning electron microscopy and transmission electron microscopy, respectively.

The results show that the porosity and volume of coarse pores of hardened binder pastes at early age (3 d) increase due to the

replacement of slag when cured at room temperature. The morphology of hardened binder pastes reveals that the addition of slag into

cement paste causes the reduction of hydration degree. At later age, the porosity becomes lower and the pore size refines, resulting in

the denser hardened complex binder pastes, compared to those of pure Portland cement paste. Unlike fibrillar hydrated calcium

silicate (C-S-H) gel in cement paste, the C-S-H gel produced by slag in the complex binder pastes exhibits a three-dimensional

foil-like structure, which can more effectively block and fill interconnected pores. When cured at high temperature (i.e., 65 ℃), the

complex binder pastes show a low porosity at both early and later ages.

基金项目：

国家自然科学基金项目(51374218)。

作者简介：

刘仍光(1979–)，男，博士。

参考文献：

[1] EKAPUTRI J J, ISHIDA T, MAEKAWA K. Autogenous shrinkage of

mortars made with different types of sag cement [C]//JCI Annual

Convention, Saitama, Japan, 2010.

[2] Report of ACI Committee 233. Slag cement in concrete and mortar,

ACI 233R-03 [S]. American Concrete Institute, Farmington Hills,

Mich, 2003.

[3] LIU Rengguang, YAN Peiyu. Study on Hydration Degree of Portland

Cement-slag Complex Binders [J]. Key Eng Mater, 2013, 539:

172–177.

[4] LIU Rengguang, YAN Peiyu. Hydration characteristics of slag in

cement-slag complex binder [J]. J Chin Ceram Soc, 2012, 40(8):

1112–1118.

[5] TAKAHASHI T, YAMAMOTO M, IOKU K, et al. Relationship

between compressive strength and pore structure of hardened cement

pastes [J]. Adv Cem Res, 1997, 9(33): 25–30.

[6] JAMBOR J. Pore structure and strength development of cement

composites [J]. Cem Concr Res, 1990, 20(6): 948–954.[7] POWERS T C, COPELAND L E, HAYES J C, et al. Permeability of

Portland cement paste [J].ACI J Proceed, 1955, 51, 285–298.

[8] MEHTA P K, MONTEIRO P J M. Concrete: Microstructure,

Properties, and Materials [M]. McGraw-Hill, 2006, 230–300.

[9] ZHOU H, YE G, VAN BREUGE K. Hydration process and pore

structure of Portland cement paste blended with blast furnace slag [C]//

Proceedings of the 6th International Symposium on Cement &

Concrete and CANMET/ACI International Symposium on Concrete

Technology for Sustainable Development, Vols 1 and 2. 2006,

417–424.

[10] STROEVEN P, HE H, GUO Z, et al. Pore Modeling Strategy in the

Perspective of Concrete Durability [C]//Advances in Concrete

Structural Durability, Proceedings of ICDCS 2008, Vols 1 and 2. 2008,

493–499.

[11] BATTAGIN A F. Influence of degree of hydration of slag on slag

cements: Proceedings of the 9th [C]//International Congress of

Chemistry of Cement Vol 3. New Delhi, India, 1992, 19(2):

166–172.

[12] LUKE K, GLASSER F P. Internal chemical evolution of the

constitution of blended cements [J]. Cem Concr Res, 1988, 19(2):

2495–2502.

[13] ESCALANTE-GARCIA J I, SHARP J H. Effect of temperature on the

hydration of the main clinker phases in Portland cements: Part II

Blended cements [J]. Cem Concr Res, 1998, 28 (9): 1259–1274.

[14] CHEN W, BROUWERS H J H. The hydration of slag, part 2: reaction

models for blended cement [J]. J Mater Sci, 2007, 42(2): 444–464.

[15] TAYLOR R, RICHARDSON I G, BRYDSON R M D. Composition

and microstructure of 20-year-old ordinary Portland cement–ground

granulated blast-furnace slag blends containing 0 to 100% slag [J].

Cem Concr Res, 2010, 40(7): 971–983.

服务与反馈：

【文章下载】【加入收藏】