![]() Stone slurry upto 16% has satisfactory performance in fresh and hardened state of concrete (Almeida et al., 2007). The compressive and flexural strength increased with burnt stone slurry (BSS) in mortar mix under autoclave and moist curing conditions (Al-Akhras et al., 2010). Replacement upto 50% of natural river sand by limestone slurry waste filler enhanced the performance of cellular light weight concrete (Kumar and Lakhani, 2017). WMP in combination with silica fume (10%) improved the performance of concrete (Vardhan et al., 2015 Rana et al., 2015 Khodabakhshian et al., 2018 Ashish, 2018). Waste marble powder (WMP) upto 10% had the satisfactory results in terms of strength and durability of concrete. Researchers are utilising stone waste as cheapest alternate materials to cement and sand in the construction industries (Vardhan et al., 2015). Recycling of waste becomes today’s need to develop beneficial and sustainable end product. The accumulation of stone slurry is the main concern to society and environment (Hussain, 2011 Mashaly et al., 2018). The direct disposal in land affected the morphology and productivity of soil and disposal in water courses pollute water and had harmful consequences. It is also a potential threat to the surroundings of dumping sites. The very fine particles of stone slurry cause problems related to respiratory system and eyes of human beings and animals. The slurry is directly dumped into open land lose its water content and very fine particles are blown by air. The stone wastes obtain in two forms: solids during extraction of stones in quarries and sludge/slurry during the dimensioning of stones. The stone industries produced waste during the extracting and manufacturing process of stones. About 15% of the total weight of stone is converted into slurry which consists of 35-45% of water content. Approximately 250 million tonnes of accumulated waste is generated from calcareous stone. Rajasthan is the leading state in stone production which contributes 90% to total production in the country. India has 32% contribution in stone production in the world. An estimated amount of 35.342 million ton stone is produced in India. India is a country with God gifted minerals i.e. It has become necessary to find alternate materials to cement to reduce its consumption upto some extent (Khodabakhshian et al., 2018 Ashish, 2018). The emission of carbon dioxide and green house gases increased with the increase in cement consumption. The growth in construction industries leads to increase in demand of cement, which is energy intensive and natural resources consuming. Kiran Devi, Babita Saini, Paratibha Aggarwal, Department of civil engineering, National Institute of Technology, Kurukshetra, IndiaĬoncrete is an important and consumable building construction material on the earth. Stone slurry powder deficited the cost while, accelerators incurred the cost of concrete. TEA had its own characteristic behaviour in terms of compressive strength depending on grade of concrete. Results showed that addition of calcium nitrate and stone slurry powder increased the strength of concrete. In the present study, calcium nitrate and triethanolamine as additive and stone slurry powder as replacement of cement were used to study their influence on compressive strength at 7 and 28 days, cost of construction and micro-structure of normal and high strength concrete. The utilisation of industrial by products in concrete not only reduces the cost of construction but also resolve their disposal and storage problem. Due to depletion of natural resources, and emission of carbon dioxide during the manufacturing of cement it is proposed to use the industrial by products in mortar and concrete as replacement of cement. Accelerators are used to accelerate the setting and development of concrete at early age, and also speed up the construction work for early removal of formwork.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |