Author : Pravin G. Gotmare 1
Date of Publication :12th April 2017
Abstract: In the modern techniques of the concrete formation there is a lot of interest in increasing amount of microfine particles (<75μm) in aggregates and it is important to understand their effect, including clay and nonclay mineralogy. The present study concentrates on extenuating the influence of fines and microfines on properties of concrete. Generally the sand used in construction industry in major metro cities is of manufactured type, which is obtained by mechanically crushing aggregates in washed or unwashed condition. After washing too some silt impurities remain in the sand and this study is carried out to understand their influence in high performance concrete (HPC). The study is carried out by preparing trial mixes, by adding 1% to 10% silt in washed manufactured sand by weight of sand for M-60 grade of concrete mix. For each trial mix workability, compressive strength, water permeability, rapid chloride penetration test, modulus of Elasticity tests are carried out as per given IS specifications to understand optimum percentage of silt should be present in the concrete, and its effect as the impurities are increased. The study confirmed that the extent of silt content decreases the workability and compressive strength of concrete
Reference :
-
- Quiroga, P. N. Ahn and Fowler, D. W. (2006) ―concrete mixtures with high microfine‖ ACI mater J., 103(4), 258-264
- Jose F. Munoz, Karl J. Gullerud, Steven M. Cramer, M. Isabel Tejedor, and Marc A. Anderson, ―Effects of Coarse Aggregate Coatings on Concrete Performance‖, Journal of materials in Civil Engineering, ASCE, pp.(96-103), January 2010
- Justin K. Norvell, Jane G. Stewart, Maria C. G. Juenger, and David W. Fowler, ―Influence of Clays and Clay-Sized Particles on Concrete Performance‖, Journal of materials in Civil Engineering, ASCE, pp.(1053-1059), December 2007
- Jane G. Stewart, Justin K Norvell, Maria C.G. Juenger, and David W. Fowler, ―Influence of Microfines aggregate characteristics on concrete performance‖, Journal of materials in Civil Engineering, ASCE, pp.(957-963), November 2007.
- Vaishali R. Marjive and B. Ram Rathan Lal, ―An Experimental Study on Stone Dust and EPS Beads Based Material‖, Geo-Chicago 2016.
- Zhan-Ao Liu and ming-Kai Zhou, ―Properties of low and high- strength concrete incorporating clay- contaminated Microfines‖, Arab J sci Eng, Springer, pp.(443-450)
- Tahir Celik and Khaled Marar, ―Effects of crushed stone dust on some properties of concrete‖, Cement and Concrete Research, Elsevier Science Ltd, Vol. 26, No. 7, pp. 1121-1130, 1996.
- Mohammed S. Imbabi, Collette Carrigan, Sean McKenna, ―Trends and developments in green cement and concrete technology‖, International Journal of Sustainable Built Environment (2012)-1, ScienceDirect, 194– 216.
- Niragi Dave, Anil Kumar Misra, Amit Srivastava, S.K. Kaushik, ―Setting time and standard consistency of quaternary binders: The influence of cementitious material addition and mixing‖, International Journal of Sustainable Built Environment (2016), ScienceDirect, October 2016
- Ping Duan, Zhonghe Shui, Wei Chen, Chunhua Shen, ―Enhancing microstructure and durability of concrete from ground granulated blast furnace slag and metakaolin as cement replacement materials‖, Journal of Materials Research and Technology (2013), Elsevier, 2013;2(1):52-59.