The effects of aggregate properties on lightweight concrete

被引：152

作者：

Lo, Tommy Y. ^{[1
]}

Tang, W. C. ^{[1
]}

Cui, H. Z. ^{[1
]}

机构：

[1] City Univ Hong Kong, Dept Bldg & Construct, Kowloon, Hong Kong, Peoples R China

来源：

BUILDING AND ENVIRONMENT | 2007年 / 42卷 / 08期

关键词：

lightweight concrete; strength; w/c ratio; porosity;

D O I：

10.1016/j.buildenv.2005.06.031

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper describes a study of the effects of several factors on the strength of lightweight aggregate concrete composites: aggregate strength, w/c ratio and the porosities of the interfacial zone and within the hardened cement paste. Concrete samples with three different water cement ratios (i.e. 0.4, 0.44, 0.48) were compared. The crushing strengths of three grades of expanded clay lightweight aggregates (i.e. 25, 15, 5 mm) and the pore distributions of the hardened cement pastes were measured. Increasing the water/cement ratio was found to decrease the strength of lightweight aggregate concrete. The numbers of pores within the cement paste and in the aggregate/cement paste interfacial zone were found to increase. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：3025 / 3029

页数：5

共 15 条

[1] Lightweight concrete in hot coastal areas [J].

Alduaij, J ;

Alshaleh, K ;

Haque, MN ;

Ellaithy, K .

CEMENT & CONCRETE COMPOSITES, 1999, 21 (5-6) :453-458

[2]

[Anonymous], 1983, FIP MANUAL LIGHTWEIG

[3] Protected paste volume in concrete - Extension to internal curing using saturated lightweight fine aggregate [J].

Bentz, DP ;

Snyder, KA .

CEMENT AND CONCRETE RESEARCH, 1999, 29 (11) :1863-1867

[4] CONTRIBUTION TO THE FORMATION MECHANISM OF THE TRANSITION ZONE BETWEEN ROCK-CEMENT PASTE [J].

BRETON, D ;

CARLESGIBERGUES, A ;

BALLIVY, G ;

GRANDET, J .

CEMENT AND CONCRETE RESEARCH, 1993, 23 (02) :335-346

[5]

*BRIT STAND I, 1983, BS1881

[6]

British Standard Institute, 1989, BS12

[7]

CHEN YZ, 1988, MATER RES SOC S P, V114, P41

[8]

*CHIN NAT STAND, 1981, 28421981 GB T

[9] Drying shrinkage of fibre-reinforced lightweight aggregate concrete containing fly ash [J].

Kayali, O ;

Haque, MN ;

Zhu, B .

CEMENT AND CONCRETE RESEARCH, 1999, 29 (11) :1835-1840

[10]

Mehta P.K., 1986, Concrete. Structure, Properties, and Materials, V2nd

← 1 2 →