Abstract
The traffic load repetition gives pressure on road may cause the settlement on road embankment especially on weak soil. One of the method to solve this problem is the use of lightweight material called foamed mortar as embankment material. In this study the authors use a foam agent as an added material from a mixture of sand, cement, water to make foamed mortar that can be applied to road foundation. This research is carried out to investigate the effect of variation of foam to water on compressive strength. From the results of mortar compressive strength test with variations of 1:20, 1:25, 1:30, 1:35, 1:40, the mean of compressive strength occurs at 28 days with the following variation are 2927 kPa, 2056 kPa, 1352 kPa, 790 kPa, and 747 kPa respectively. Based on the test results, variations of 1:20, 1:25, and 1:30 have met the compressive strength required at 800 kPa, while the variations of 1:35, 1:40 are below the target.
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