TY - JOUR AU - Charoenchai Ridtirud, AU - Somporn Leekongbub, AU - Prinya Chindaprasirt, PY - 2018/02/25 Y2 - 2024/03/28 TI - COMPRESSIVESTRENGTH OF SOIL CEMENT BASE MIXED WITH FLY ASH –BASED GEOPOLYMER JF - GEOMATE Journal JA - INTERNATIONAL JOURNAL OF GEOMATE VL - 14 IS - 46 SE - Articles DO - UR - https://geomatejournal.com/geomate/article/view/2882 SP - 82-88 AB - <p>At present, the improvement of compressive strength of soil using the Portland cement is<br>widely used for roads and embankments, however, it has an enormous impact on the environment.<br>Geopolymer cement is a material that can replace Portland cement and has less impact on the environment.<br>Therefore, this research aims to study lateritic soil improvement by using Fly ash-based geopolymer<br>materials. Percentage of fly ash was 1.5, 3, 5, 7, 10, 15 and 20 % by weight. Specimens were prepared by the<br>method of modified Proctor compaction test. Curing was done at 40oC for 24 hours and immerse in water for<br>2 hours before the tests. Unconfined compressive strength tests at 7, 14 and 28 days were performed. The<br>results showed that the 5% fly ash by weight and NaOH/Na2SiO3 ratio of 1/1 was leading to the improvement<br>of compressive strength above 17.5 ksc which is higher than the standard No. DH-S. 204/2533 - Soil cement<br>base.<br><br></p> ER -