A study on the relationship between porosity of the cement paste with mineral additives and compressive strength of mortar based on this paste

被引：75

作者：

Li, Yong-Xin ^{[1
]}

Chen, Yi-Min ^{[1
]}

Wei, Jiang-Xiong ^{[1
]}

He, Xing-Yang ^{[1
]}

Zhang, Hong-Tao ^{[1
]}

Zhang, Wen-Sheng ^{[1
]}

机构：

[1] China Bldg Mat Acad, Inst Cement & New Bldg Mat, Beijing 100024, Peoples R China

来源：

CEMENT AND CONCRETE RESEARCH | 2006年 / 36卷 / 09期

关键词：

porosity; compressive strength; steel-making slag; granulated blast furnace slag; fly ash;

D O I：

10.1016/j.cemconres.2004.07.007

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Mercury intrusion porosimetry study was carried out on ordinary Portland cement (OPC) pastes with 10% to 40% mineral additives, such as steel-making slag, granulated blast furnace slag and fly ash. For all samples, the porosity of paste and compressive strength of mortar based on this paste were determined at 3, 7, 28, 90 and 180 days. Relationship between the porosity and strength was investigated and some equations for the strength-porosity relationship were presented according to Balshin multiplicative model. Results show that mineral additives delayed process that micropore structure of OPC paste developed and strength development of sample with mineral additives was faster than that of OPC sample. Balshin equation fits the results of strength and porosity of all samples and there is a strongly quantitative relationship between strength and porosity. After being mixed with mineral additives, the intrinsic strength sigma(o) and power n both increased and the sequence of sigma(o) and n for different mineral additives was fly ash>steel-making slag>blast furnace slag. (C) 2006 Published by Elsevier Ltd.

引用

页码：1740 / 1743

页数：4

共 10 条

[1]

[Anonymous], CEMENT CONCRETE RES

[2]

[Anonymous], 1981, CEMENT CONCRETE AGGR

[3]

BAOZHEN S, 1987, P INT RILEM C VERS F, P232

[4]

BENTUR A, 1982, CERAMIC B, V61, P1296

[5] Use of fly ash or silica fume to increase the resistance of concrete to feed acids [J].

De Belie, N ;

De Coster, V ;

Van Nieuwenburg, D .

MAGAZINE OF CONCRETE RESEARCH, 1997, 49 (181) :337-344

[6] The effect of porosity on the strength of foamed concrete [J].

Kearsley, EP ;

Wainwright, PJ .

CEMENT AND CONCRETE RESEARCH, 2002, 32 (02) :233-239

[7]

MAEDA Y, 1998, FLY ASH SILICA FUME, P837

[8] STUDIES ON BLENDED PORTLAND CEMENTS CONTAINING SANTORIN EARTH [J].

MEHTA, PK .

CEMENT AND CONCRETE RESEARCH, 1981, 11 (04) :507-518

[9] INVESTIGATIONS ON THE RELATIONSHIP BETWEEN POROSITY, STRUCTURE AND STRENGTH OF HYDRATED PORTLAND-CEMENT PASTES .2. EFFECT OF PORE STRUCTURE AND OF DEGREE OF HYDRATION [J].

ODLER, I ;

ROSSLER, M .

CEMENT AND CONCRETE RESEARCH, 1985, 15 (03) :401-410

[10] The influence of mineral additives on the strength and porosity of OPC mortar [J].

Pandey, SP ;

Sharma, RL .

CEMENT AND CONCRETE RESEARCH, 2000, 30 (01) :19-23

← 1 →