Water sorptivity and chloride diffusivity of oil shale ash concrete

Effect of metakaolin and foundry sand on the near surface characteristics of concrete

“…higher MK replacement levels are not helpful in improving durability and mechanical properties of concrete. Similar findings were reported by Gopalan [3] and Chan and Ji [15]. Fig.…”

“…For 0% FS at 15% MK replacement, compressive strength decreased by 5. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].5% at all ages. (5) With 20% FS, as the MK content was increased from 5% to 15%, there was reduction in the flow up to 10.2% at 7-day, 19.1% at 28-day, and 14.8% at 56-day.…”

“…Chan and Ji [15] have found that increasing the water curing period resulted in significant increase in strength and decrease in water sorptivity and chloride diffusivity, particularly for concretes with a high replacement level.…”

Effect of silicon dose on preparation and coagulation performance of poly-ferric-aluminum-silicate-sulfate from oil shale ash

“…At the same time, a large of oil shale ash is abandoned, which consists of ferric oxide, aluminum oxide, silicon oxide and others. They were used to produce nanoscale gamma-alumina powder, zeolite, filter media, silica aerogel, silica powders, building material and so on [16][17][18][19][20][21]. But even then the high value-added products are desirous.…”

Effects of Silica Fume Content and Polymer-Binder Ratio on Properties of Ultrarapid-Hardening Polymer-Modified Mortars

“…The UPM with polymer-binder ratio of 2 % and SF content of 6 % (1.4 %) decreased about 84 % smaller than that of the unmodified mortar (8.9 %). Chan and Ji (1998) concluded that the utilization of SF up to 20 % replacement by weight of the cement significantly improved the water absorption of the concretes, particularly for high replacement levels in their paper. The water absorption of the UPM using SF was reduced about 1/6 level of the unmodified mortar.…”