Effect of temperature on physical and mechanical properties of concrete containing silica fume

Journal Article · Wed May 01 04:00:00 EDT 1996 · Cement and Concrete Research

DOI:https://doi.org/10.1016/S0008-8846(96)85002-2· OSTI ID:253779

Saad, M; Hanna, G B ^[1]; Abo-El-Enein, S A; Kotkata, M F ^[2]

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1. Building Research Center, Cairo (Egypt)
2. Ain Shams Univ., Cairo (Egypt). Faculty of Science

Heat-resistant materials are usually used for structural purposes. The need for such building materials is particularly important in the chemical and metallurgical industries and for the thermal shieldings of nuclear power plants. Thus the effect of high temperatures on physical and mechanical properties of concrete was investigated. In this study ordinary Portland cement has been partially replaced by ratios of silica fume. The heat treatment temperature varied from 100 to 600 C by increments of 100 C for three hours without any load. Concrete specimens were treated at each temperature level. The specimens were heated under the same condition for each temperature level. Comparison between physical and mechanical properties during heat treatment were investigated. All specimens were moist-cured for 28 days after casting. Tests were carried out on specimens cooled slowly to room temperature after heating. Results of this investigation indicated that the replacement of ordinary Portland cement by 10% silica fume by weight improved the compressive strength by about 64.6%, but replacement of ordinary Portland cement by silica fume by ratios 20 and 30% improved the compressive strength by only 28% at 600 C. This could be attributed to the additional tobermorite gel (CSH phase) which formed due to the reaction of silica fume with Ca(OH){sub 2}.

• OSTI ID: 253779
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 5 Vol. 26; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
36 MATERIALS SCIENCE
ASHES
COMPRESSION STRENGTH
CONCRETES
HEAT RESISTANT MATERIALS
MECHANICAL PROPERTIES
PHASE STUDIES
PHYSICAL PROPERTIES
SAMPLE PREPARATION
TEMPERATURE DEPENDENCE
THERMAL SHIELDS
WASTE PRODUCT UTILIZATION