Utilization of Carbidemud to Produce Special Cement (CM-Cement) and Applications of the Latter

Abstract

The waste product of carbide after the extraction of acetylene gas, known as called cardidemud, is for the most part practically being thrown away in most synthetic chemical plants. In view of the fact that the principal composition of this mud is Ca(OH)2 we have made experiments and found out that carbidemud can be utilized to produce special sort of cement different from common portland cement by making its mixture with cinder ash and quenched blast furnace slag.We have named this special cement“CM-cement.”The characteristics of CM-cement are:(1) The ingredient material being the waste product of plants, the cost is outstandingly low, and available near the plant.(2) The maximum compressive strength of 300kg/cm2 is available in 28 days in standard curing.(3) There is almost no febrility apt to be occasioned by the hydration after mixing.(4) The hydration of CM-cement is in general quite similar to that of portland cement, but its strength at early age is lower than that of normal portland cement.(5) The specific weight of the concrete with this cement is 20% lighter than normal concrete.The CM-cement with the above mentioned characteristics will be used in making precast concrete blocks, plaster works of buildings, in prevention construction of slope failure, in grouting works and in construction of foundation works and simple pavements. These are important ways to utilization of waste materials for civil and architectual construction materials. This CM-cement is considered to be effective also in soil improvement works. More economical and efficient works will be developed in construction of foundation works for super structures, in reclamation works, in banking and in readjustment of steep slopes.