Physico chemical characteristics or the industrial behaviour of any coal is directly controlled by its organic micro components (macerals). The yields of by products during carbonization of coal are affected by organo micro components of different coals and operating parameters, such as, charging technologies, carbonization temperature, particle size, bulk density, etc. In the present investigation, the effects of volatile matters (16.61-36.00%), Ro, avg. (0.80-1.36%), exinite (0.5-4.5%), hydrogen (4.34-5.29%) and nitrogen (1.60-2.18%) content of coal on yield of by products, such as, coke oven gas, coal tar, ammonia, and hydro gen sulphide were studied. The studies revealed that there is a significant difference of the yield of by products for the two different charging technologies. The coke oven gas, coal tar and ammonia yield was lower in stamp charging process as compared to top charging process, whereas, hydrogen sulphide yield followed a reverse trend.

Sugarcane bagasse ash is the admixtures used in this study. As we are an agricultural country and we harvest at least two crops yearly. These two crops are harvested every year and the yields produce a lot of waste in the form bagasse. This produces around at least 20 to 30% of waste of the total yield. Traditionally this waste is disposed off by burning it in the open fields. This acts as a fertilizer for the next crop, but it has a very bad effect on the environment as the smoke generated increases the air pollution. Hence using this material as partial replacements to cement will not only prevent open field burning but will also reduce the cement consumption. The density of sugarcane bagasse ash is lesser than cement and hence reduces the weight of the concrete manufactured using this as partial replacement to cement[1]. There are lot of research studies about manufacturing of light weight concrete using light weight aggregates[2]. Hence in addition to the light weight aggregates if light weight mineral admixtures are also used they will further reduce the weight of concrete thus leading to reduction in self weight of the structure. Hence including sugarcane bagasse ash in concrete as partial replacement to cement will not only reduce and recycle the waste but will also produce an economical, sustainable and light weight concrete mix.