Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Modulus of Elasticity, Creep and Shrinkage of Concrete-Phase II. Part 1-Creep Study
A laboratory testing program was performed to evaluate the physical and mechanical properties of typical Class II, IV, V and VI concrete mixtures made with a Miami Oolite limestone, a Georgia granite, and a lightweight aggregate Stalite, including compressive strength, indirect tensile strength, modulus of elasticity, creep, and shrinkage. A total of 18 different concrete mixes, with water-to-cement (w/c) ratio varying from 0.24 to 0.44, were evaluated. Fly ash and ground blast-furnace slag were also incorporated as mineral additives in these mixes. Creep apparatuses were designed and built for the study. The creep apparatuses and testing procedures used were found to work satisfactorily. The creep apparatus was capable of applying and maintaining a load up to 145,000 lb on the test specimens with an error of less than 2%. Curing condition had a significant effect on the creep behavior of concrete evaluated in the study. The concretes which had been moist-cured for 14 days had substantially lower creep coefficients than those which had been moist-cured for only 7 days. Using the test results from the concretes investigated, relationships were developed between various mechanical properties, including compressive strength, splitting tensile strength, and elastic modulus. Relationships were also established between compressive strength of the concrete and the creep coefficient of the concretes. The predicted ultimate shrinkage strains and ultimate creep coefficients were determined for the concretes evaluated. The predicted ultimate creep coefficients of most of the concrete tested appeared to exceed 2.0.
Modulus of Elasticity, Creep and Shrinkage of Concrete-Phase II. Part 1-Creep Study
A laboratory testing program was performed to evaluate the physical and mechanical properties of typical Class II, IV, V and VI concrete mixtures made with a Miami Oolite limestone, a Georgia granite, and a lightweight aggregate Stalite, including compressive strength, indirect tensile strength, modulus of elasticity, creep, and shrinkage. A total of 18 different concrete mixes, with water-to-cement (w/c) ratio varying from 0.24 to 0.44, were evaluated. Fly ash and ground blast-furnace slag were also incorporated as mineral additives in these mixes. Creep apparatuses were designed and built for the study. The creep apparatuses and testing procedures used were found to work satisfactorily. The creep apparatus was capable of applying and maintaining a load up to 145,000 lb on the test specimens with an error of less than 2%. Curing condition had a significant effect on the creep behavior of concrete evaluated in the study. The concretes which had been moist-cured for 14 days had substantially lower creep coefficients than those which had been moist-cured for only 7 days. Using the test results from the concretes investigated, relationships were developed between various mechanical properties, including compressive strength, splitting tensile strength, and elastic modulus. Relationships were also established between compressive strength of the concrete and the creep coefficient of the concretes. The predicted ultimate shrinkage strains and ultimate creep coefficients were determined for the concretes evaluated. The predicted ultimate creep coefficients of most of the concrete tested appeared to exceed 2.0.
Modulus of Elasticity, Creep and Shrinkage of Concrete-Phase II. Part 1-Creep Study
M. Tia (Autor:in) / Y. Liu (Autor:in) / B. Haranki (Autor:in) / Y. M. Su (Autor:in)
2009
224 pages
Report
Keine Angabe
Englisch
Construction Equipment, Materials, & Supplies , Highway Engineering , Construction Materials, Components, & Equipment , Lightweight concrete , Modulus of elasticity , Graphs(Charts) , Shrinkage , Creep , Finite element analysis , Tensile strength , Compressive strength , Test methods , Reclaimed Asphalt Pavement(RAP) , Recycled Concrete Aggregate(RCA)
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