CD Tesis
Perbaikan Kualitas Air Gambut Sebagai Air Pencampur Untuk Konstruksi Beton Di Lingkungan Gambut
Peat water is found in many lowland areas in Sumatra, especially in Bengkalis Regency. Peat water is dark brown-black in color, has high organic content and has high acidity. Generally in remote areas on the island of Bengkalis. Peat water is also used as water for treating concrete, even though the characteristics of peat water do not meet the requirements as clean water. In this research, a study of the compressive strength and porosity of concrete using peat water that has not been treated and has been treated with quicklime. Quicklime (CaO) is used as much as 0.05 g / l and dissolved for 5-10 minutes to produce water with a pH of 7. The concrete is planned to use Ordinary Portland Cement (OPC) and Portland Composite Cement (PCC) binders with a compressive strength of a plan of 20 MPa at 28 days of age. The specimens were made with peat water mixed with quicklime, and after printing the specimens were immersed directly in the peat water channel in Bengkalis Regency. The results showed that the compressive strength of OPC concrete using peat-quicklime (OPC-K) water increased during the immersion life of up to 150 days. Meanwhile, PCC concrete with peat-quicklime water (PCC-K) continued to increase in compressive strength until the age of 91 days, but there was a decrease in strength until the age of 150 days. OPC control concrete showed a decrease in compressive strength after immersion, but PCC control concrete showed an increase in strength. The porosity of OPC-K concrete continued to increase at the age of 150 days, while for PCC-K concrete there was a significant decrease in porosity. The use of peat water with quicklime as mixing water can improve the compressive strength and porosity of OPC and PCC concrete.
Keywords: peat water, quicklime, compressive strength, porosity, cemen
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