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@article{MKTS63604, author = {Yulita Priastiwi, ST. MT. and Hardi Wibowo and Purwanto Puwanto and Arif Hidayat and Inandhiya Ulayya and Nensi Carita}, title = {Pengaruh Air Laut terhadap Kuat Tekan, Permeabilitas, dan Mikrostruktur Beton Geopolimer dengan Flyash dan Tanah Putih sebagai Pengganti Semen}, journal = {MEDIA KOMUNIKASI TEKNIK SIPIL}, volume = {30}, number = {1}, year = {2024}, keywords = {Geopolymer; fly ash; white soil; sea water; activator}, abstract = {The increasing infrastructure development of an area is sometimes located in an aggressive environment, one of which is in coastal areas so that direct contact with sea air cannot be avoided. This research aims to determine the effect of sea water on geopolymer concrete using fly ash and white soil as cement substitutes with testing parameters for compressive strength, permeability and microstructure. The test objects used were cylindrical in shape measuring 150x300 mm and 100x200 mm. The ratio of fly ash and white soil used was 85%:15% and the activator used was NaOH 8M and Na 2 SiO 3 with a ratio of 1:2,5. The mixture proportion using a ratio of 1 fly ash: 1,497 sand: 2 split: 0,451 alkali activator with a mutual plan is 35 MPa. Tests were carried out after the concrete had gone through a curing process for 56 days, then the concrete was conditioned without soaking and with soaking for 28 days. Tests were carried out at concrete ages of 56 and 87 days. The test results show that geopolymer concrete with the influence of sea water has a higher compressive strength value and a smaller permeability coefficient compared to concrete without the influence of sea water. Microstructural testing of geopolymer concrete under the influence of sea air produces a matrix-shaped structure morphology that is denser with fewer pores compared to concrete without the influence of sea air.}, issn = {25496778}, pages = {65--74} doi = {10.14710/mkts.v30i1.63604}, url = {https://ejournal.undip.ac.id/index.php/mkts/article/view/63604} }
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