Effect Of Methylmethacrylate And Ethylendiammine Additives On Phsico-Mechanical And Cementing Properties Of Portland Cement

Different doses (1, 2, 3, 4 and 5%) of methylmethacrylate (CH2=CHCH3COOCH3) and ethylendiammine (NH2CH2CH2NH2) were added to ordinary Portland cement to study their effect on its cementing properties (water of consistency, setting time, bulk density, apparent porosity, cold crushing strength and hydration behavior i.e., combined water at different curing times; 3, 7 and 28 days). The results indicated that methylmethacrylate acts as a setting retarder with increasing water of consistency, it has a negative effect on bulk density, apparent porosity, cold crushing strength and hydration properties, however when present in limited content (not more than 2 %) its negative effect is relatively slight. On the other hand, ethylendiammine acts as a water reducing and setting accelerator agent, its addition up to 3 % results in a remarkable improvement in the above-mentioned properties