Creep analysis of concrete containing rice husk ash |
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| Affiliation: | 1. College of Civil Engineering, Shaoxing University, Shaoxing 312000, China;2. School of Marine Science and Engineering, University of Plymouth, PL4 8AA, UK;1. College of Civil Engineering at Tongji University, Shanghai 200092, China;2. School of Civil Engineering at Southeast University, Nanjing 210096, China;1. Dept. of Civil Engineering, Aligarh Muslim University, Aligarh, India;2. Dept. of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, India;3. Chair for Research and Studies in Strengthening and Rehabilitation of Structures, Department of Civil Engineering, King Saud University, Riyadh, Saudi Arabia |
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| Abstract: | This paper presents an experimental study on the mechanical properties of concrete added with rice husk ash (RHA) as a supplementary cementitious material. The compressive strength, modulus of elasticity and creep were obtained experimentally from specimens with different RHA contents (0%, 10%, 15% and 20% of binder). The results show that the addition of RHA in concrete can improve both the compressive strength and modulus of elasticity and reduce the creep of concrete. The examination of pore micro-structure of hardened concrete using both the mercury intrusion porosimetry and scanning electron microscope techniques demonstrates that RHA particles can react with calcium hydroxide originated from cement hydration to produce additional C-S-H, which can fill voids and large pores and thus reduces the porosity related to capillary pores and voids. In addition, the release of absorbed water, which is retained in the small pores of RHA particles at early days, can improve cement hydration and thus reduce the porosity related to gel pores. |
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| Keywords: | Concrete Rice husk ash Compressive strength Elastic modulus Creep |
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