PERMEABILITY, POROSITY AND COMPRESSIVE STRENGTH OF OPC AND OPC/FLY ASH CONCRETE CONTAINING USED ENGINE OIL

Department Of Civil Engineering University Technology Petronas, Malaysia

Use of mineral admixtures, processed and unprocessed industrial by-products and domestic and

agricultural wastes as raw materials in cement and concrete is becoming popular. This has a

positive environmental effect as the cost of safe disposal of waste is significantly higher and

there are strict environmental regulations. Some references indicate that the leakage of oil into

the cement in older grinding units resulted in concrete with greater resistance to freezing and

thawing.

This effect is similar to adding an air-entraining chemical admixture to the concrete. However,

the hypothesis is not backed by significant research study reported in the available literature.

This research study was conducted to investigate the effects of used engine oil on properties of

fresh and hardened concrete made of 100% cement and fly ash blended cement. The main

variables included the type and dosage of an air-entraining agent (SIKA AER) commercially

available air entraining agent, used engine oil, and new engine oil. Results showed that used

engine oil increased the slump between 18 to 38% and air content between 26 to 58% with

respect to the control mix containing no admixture, used engine oil reasonably reduced the

porosity and oxygen permeability and did not adversely affect the strength properties of

hardened concrete.