EFFECTIVENESS OF MICRONIZED CALCITE IN REDUCING EXPANSIONS DUE TO ALKALI SILICA REACTION
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND CONSTRUCTION ENGINEERING
Author(s): ESMA GIZEM DASKIRAN , HASAN YILDIRIM
Abstract: This paper investigates the effectiveness of micronized calcite in reducing expansion of concrete due to alkali-silica reaction. Three aggregates; two natural sands and one crushed stone aggregate were used preparing mortar bars in accordance with accelerated mortar bar test method, ASTM C1260. Performance of micronized calcite is determined by examining the expansions due to alkali silica reaction. Micronized calcite added to the mixtures at %10 and %20 replacement levels by weight of cement. Also in this research, effect of different cement usage to expansions was investigated by using the same method. Four different cements were used for this purpose. Usage of micronized calcite at %20 replacement level of cement was effective in mitigating ASR expansions whereas using it at %10 was not enough to suppress them. Different cement usage showed a minor difference between the expansions; however, the final decision about the reactivity of aggregate was indecisive.
- Publication Date: 08-Jun-2014
- DOI: 10.15224/978-1-63248-020-0-24
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- Downloads: 0
CHARACTERIZATION OF THREE RECYCLED MATERIALS FOR ALTERNATIVE USE OF MORTARS
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND CONSTRUCTION ENGINEERING
Author(s): F. GUADALUPE CABRERA-COVARRUBIAS , ANTONIA NAVARRO-EZQUERRA
Abstract: Because natural resources in construction are limited, it is advisable to look for new alternatives that meet comparable functions, and likewise, reduce consumption of non-renewable resources. The use of recycled materials is of benefit to the uncontrolled elimination of residues that cause the use of the public resources, such as landfills. In addition, this contributes to the reduction of the environmental impact caused by the industries in the process of obtaining the same ones. Therefore, recycled materials such as concrete or masonry demolished, glass and ceramics different, can be employed in different ways to be used in the construction industry. This work focuses on presenting the initial characterization of three recycled materials as an alternative to use in replacement of natural sand in mortars, this as a first step for further study in different percentages of replacement, as currently his understanding is unknown, or little known.
- Publication Date: 08-Jun-2014
- DOI: 10.15224/978-1-63248-020-0-25
- Views: 0
- Downloads: 0