Use of Preplaced Casting Method in Lightweight Aggregate Concrete

被引：16

作者：

Du, Qiang ^{[1
]}

Sun, Qiang ^{[1
]}

Lv, Jing ^{[1
]}

Yang, Jian ^{[2
]}

机构：

[1] Changan Univ, Sch Civil Engn, Xian 710061, Shaanxi, Peoples R China

[2] Univ Birmingham, Sch Civil Engn, Birmingham B15 2TT, W Midlands, England

来源：

ADVANCES IN MATERIALS SCIENCE AND ENGINEERING | 2017年 / 2017卷

关键词：

MECHANICAL-PROPERTIES; HIGH-VOLUME; FLY-ASH; ENGINEERING PROPERTIES; LIMESTONE POWDER; STRENGTH; WASTE; SAND;

D O I：

10.1155/2017/7234761

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study addresses the use of preplaced casting method in lightweight aggregate concrete (LC) to provide a new perspective to solve the aggregate segregation. In casting preplaced lightweight aggregate concrete (PLC), the lightweight aggregates are cast into formworks and then fresh grout is injected to fill voids. PLC and conventional lightweight aggregate concrete (CLC) with three different mixtures are compared to observe the degree of segregation. The properties of PLC and CLC are characterized by means of cubic and axial compression, splitting tension and flexural tests, staticmodulus of elasticity, and drying shrinkage measurements. Results show that the mechanical properties of PLC are improved with respect to that of CLC with the same mixture. The increase of shrinkage is approximately 13% for the CLC and 6% for PLC when w/c ratio ranges from 0.4 to 0.5 due to effect on interlocking. PLC shows an increased tendency in elastic modulus by approximately 2.5% of 0.5 w/c ratio, 2.7% of 0.45 w/c ratio, and 3.3% of 0.4 w/c ratio at the age of 28 days compared with CLC. In conclusion, PLC has significant reduction in the weight on the premise that it shows excellent mechanical properties.

引用

页码：1 / 7

页数：7

共 30 条

[1] Effect of grout proportions on strength of two-stage concrete [J].

Abdelgader, Hakim S. ;

Elgalhud, Abdurrahman A. .

Structural Concrete, 2008, 9 (03) :163-170

[2]

Abdelgader H.S., 2016, CONCRETE PLANT PRECA, V82, P38

[3] Stress-strain relations and modulus of elasticity of two-stage concrete [J].

Abdelgader, HS ;

Górski, J .

JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2003, 15 (04) :329-334

[4] Effect of the quantity of sand on the compressive strength of two-stage concrete [J].

Abdelgader, HS .

MAGAZINE OF CONCRETE RESEARCH, 1996, 48 (177) :353-360

[5] How to design concrete produced by a two-stage concreting method [J].

Abdelgader, HS .

CEMENT AND CONCRETE RESEARCH, 1999, 29 (03) :331-337

[6]

[Anonymous], 2006, JGJ122006

[7] Performance evaluation of concrete containing high volume palm oil fuel ash exposed to elevated temperature [J].

Awal, A. S. M. Abdul ;

Shehu, I. A. .

CONSTRUCTION AND BUILDING MATERIALS, 2015, 76 :214-220

[8] Image processing applied to the analysis of segregation in lightweight aggregate concretes [J].

Barbosa, F. S. ;

Beaucour, A. -L. ;

Farage, M. C. R. ;

Ortola, S. .

CONSTRUCTION AND BUILDING MATERIALS, 2011, 25 (08) :3375-3381

[9] Prevention of autogenous shrinkage in high-strength concrete by internal curing using wet lightweight aggregates [J].

Bentur, A ;

Igarashi, S ;

Kovler, K .

CEMENT AND CONCRETE RESEARCH, 2001, 31 (11) :1587-1591

[10] Capillary absorption of structural lightweight aggregate concrete [J].

Bogas, J. Alexandre ;

Gomes, M. Gloria ;

Real, Sofia .

MATERIALS AND STRUCTURES, 2015, 48 (09) :2869-2883

← 1 2 3 →