Abstract
To reduce the environmental pollution caused by cement manufacturing and to save both the economy and resources, it is required to use alternative waste materials of pozzolanic nature to partially replace cement in the construction industry. Among different cement replacement materials being used now-a-days, marble dust is the one on which limited research has been done especially on the performance of structural members like RC slabs. In this paper, marble dust has been used in different ratios as partial replacement of cement in concrete mix. RC one-way slabs as well as plain concrete standard samples were cast to determine their mechanical properties i.e. compressive, tensile and flexural strengths, stiffness, first & ultimate load, crack patterns, modulus of elasticity, maximum deflection and durability etc. It was found that by increasing the dosage of marble dust in plain concrete samples, workability was decreased. Compressive and tensile strengths of concrete increased up to 7.5% replacement but decreased on further replacement. The permeability of concrete decreased with the addition of marble dust up to 10% replacement, then it increased. The behavior of one-way slabs showed an increase in the first crack load and ultimate failure capacity. Moreover, decrease in the deflection of slabs was observed with the increasing replacement of cement with marble dust. The resistance of concrete against corrosion of steel reinforcement also increased due to less migration of chloride ions. Ultrasonic Pulse Velocity (UPV) tests showed improved homogeneity and stiffness of concrete structure with the replacement of cement by marble dust.
Highlights
Concrete is a heterogeneous material in which binding material and aggregates are mixed in a definite ratio for a specific concrete grade, according to the required strength and use
This study focused on the improvement of Marble dust is one of the industrial solid waste physio-chemical properties of concrete with marble materials that causes health problems and severely dust addition
Marble dust particles have more surface area, due to which it absorbed more water that resulted in decrease of workability of concrete [9]
Summary
Concrete is a heterogeneous material in which binding material and aggregates are mixed in a definite ratio for a specific concrete grade, according to the required strength and use. Effect of utilizing environment from air, land and water pollution caused waste marble dust as partial replacement of cement in mainly by these waste materials. The effect of marble experimental results showed that, compressive and dust as pozzolanic material in RCC one-way slabs in tensile strength of concrete decreased, as dosage of terms of its flexural strength, stiffness, durability sawdust increased. Type-I Ordinary Portland Cement (OPC) was used in blasting increases waste percentage by 60% to 70% During marble quarrying, this dust is generated that brands of the OPC in Pakistan is “Fauji Cement”. 2.2 Fine aggregates million tonnes of marble and granite were produced while 97% of it were consumed locally [11] According to another estimate, there are 160.2 million aggregates, commonly called Sand.
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