Water-retaining, thickening and reinforcing additive for cement mortar and cement mortar containing additive
A cement mortar, water retention and thickening technology, applied in the field of building materials, can solve the problems of high cement consumption, high water demand, easy cracking cost of mortar, etc., achieve the effect of increasing mortar strength, reducing cement consumption, and improving work performance
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Embodiment 1
[0039] Embodiment 1 of the present invention provides a water retention and thickening enhancing additive for cement mortar, which is modified cellulose of corn stover; wherein, the modified cellulose of corn stover is a by-product cellulose produced by refining hemicellulose from corn stover as a raw material, and is used as a raw material. The pH value of the sodium hydroxide solution is adjusted to 7.6, and then put into a dryer for drying, and then ground into powder solid, ensuring that the pass rate of the powder through a 60-mesh sieve is greater than 95%, and the corn stover modified cellulose is obtained.
[0040] The preparation method of the cement mortar containing the above-mentioned water retention and thickening reinforcing material is as follows: weighing the components according to the weight ratios described in Table 1, and uniformly mixing them physically and mechanically to obtain the mortar of the present invention.
[0041] Table 1: Existing cement mortar ...
Embodiment 2
[0049] Embodiment 2 of the present invention provides a cement mortar water retention and thickening enhancement additive, wherein the parts by weight of each component in the additive are: 95 parts by weight of corn stover modified cellulose, 25 parts by weight of cellulose ether and 30 parts by weight of sodium gluconate Parts by weight; wherein, corn stover modified cellulose is the by-product cellulose produced by refining hemicellulose from corn stover as raw material, and its pH value is adjusted to 7.5 with sodium hydroxide solution, and then put into a dryer for drying, and then pulverized into cellulose. The powder is solid, and the 60-mesh sieve pass rate of the powder is guaranteed to be greater than 95%, and the modified cellulose of corn stover is obtained.
[0050] Table 4: Existing cement mortar and cement mortar mix ratio comparison table of Example 2
[0051]
[0052] Table 5: Comparison table of performance testing results of existing mortar and cement mor...
Embodiment 3
[0058] Embodiment 3 of the present invention provides a cement mortar water retention and thickening enhancement additive, wherein the parts by weight of each component in the additive are: 74 parts by weight of corn stover modified cellulose, 14 parts by weight of cellulose ether, and 15 parts by weight of sodium gluconate. parts by weight and 36 parts by weight of high-efficiency water-reducing agent; wherein, corn stover modified cellulose is the by-product cellulose produced by refining hemicellulose from corn stover as raw material, and its pH value is adjusted to 7.5 with sodium hydroxide solution, and then put into drying After drying in a drying machine, it is ground into powder solid, ensuring that the passing rate of the powder through 60-mesh sieve is greater than 95% to obtain corn stalk modified cellulose;
[0059] Table 7: Existing cement mortar and cement mortar mix ratio comparison table of Example 3
[0060]
[0061] Table 8: Comparison table of performance...
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