نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی عمران، دانشکده مهندسی، دانشگاه بوعلی سینا، همدان
2 دانشیار دانشکده مهندسی، دانشگاه بوعلی سینا
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
One of the important features of self-compacted lightweight concrete is shrinkage, which affects durability and service life of the structures. In the present study, self-compacted lightweight concretes containing Scoria and Leca were produced with two water-cement ratios (0.35, 0.4) and two coarse percentages (35%, 40%). Workability, compressive strength and modulus of elasticity of the specimens were evaluated. Moreover, the long term shrinkage strain was monitored during one year. The results indicated that it is possible to produce self-compacted lightweight containing Scoria and Leca with proper workability, compressive strength and modulus of elasticity of more than 30 MPa and 17 GPa, respectively. Also, the shrinkage value of self-compacted lightweight concretes was 38% lower than those for self-compacted ones. Reducing the water to cement ratio and increasing coarse percentage resulted into 50% and 36% decreases in the shrinkage, in turn. Monitoring of the results revealed that 80% of the total shrinkage strain occurred until 250 days.
کلیدواژهها [English]