Cement mortar additive comprising hydrophobic silica, and preparation method therefor
AssigneeLotte Fine Chemical Co., Ltd.
InventorsHyun Ji Jeong, Bong Jin Kwon, Ji Eun Ju
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Abstract
The present disclosure relates to a cement mortar additive and a method of manufacturing the same. More particularly, the present disclosure relates to a cement mortar additive for solving the inhomogeneity, which is a problem caused by the deliquescence of urea, so that the deterioration of the physical properties of a cement mortar is prevented and the open time, water retentivity, and workability of the cement mortar are improved, and to a method of manufacturing the cement mortar additive.
Claims11
A cement mortar additive comprising:
- cellulose ether;
- urea powder;
- and
- hydrophobic silica,
- wherein a content of the cellulose ether is 65 to 89.3 wt %, a content of the urea powder is 10 to 30 wt %, and a content of the hydrophobic silica is 0.7 to 5 wt %.
A method of manufacturing a cement mortar additive containing urea powder, the method comprising:
- (a) pulverizing urea to provide the urea powder;
- and
- (b) mixing the urea powder with hydrophobic silica and cellulose ether,
- wherein the cement mortar additive includes 65 to 89.3 wt % of the cellulose ether, 10 to 30 wt % of the urea, and 0.7 to 5 wt % of the hydrophobic silica.
A method of manufacturing a cement mortar additive containing urea powder, the method comprising:
- (i) mixing urea and hydrophobic silica to provide a mixture;
- (ii) pulverizing the mixture to obtain a mixed powder;
- and
- (iii) mixing the mixed powder with cellulose ether.
Dependencies are inferred from the claim text.