Effect of using glass powder as a partial replacement of cement on concrete properties

الملخص EN

The cement industry causes many environmental damages, because its manufacture causes the emission of greenhouse gases to the atmosphere, such as Co2, which leads to the global warming.

therefore, the search for new building material has become one of the most prominent engineering researches supported by construction companies in the world.

this research studies the effect of using waste glass powder as a partial substitute of cement at rates from 5% to 20% at a fixed increase rate of 5% on some of different properties of concrete with grade M 35 by using Sikament-163m is used as a super plasticizer by 1% from weight of cement.

laboratory tests were conducted to compare the performance of the control sample and the samples containing waste glass powder, and this was done on fresh concrete to determine its workability by slump test and also the tests were conducted on hardened concrete to determine the compressive strength at the ages of 7, 28, 56 days, as well as determining the flexural strength, water penetration resistance of concrete, modulus of elasticity test and XRD analysis test of all samples at the age of 28 days.

the results clearly confirmed an increase in the workability of concrete with an increase in the percentage of waste glass powder in the mixture.

it also showed a good improvement in the compressive strength, flexural strength, modulus of elasticity, and the optimum percentage of improvement was 15% WGP.

and then it declined.

the XRD test actually proved that the glass powder has a pozzolanic reaction with cement hydrate.

in the end, it was found that the penetration of water into the sample decreases by increasing the content of the glass powder in the mixture.