A kind of cement-based grouting material for marine engineering and preparation method thereof
A grouting material and marine engineering technology, applied in the field of marine engineering materials, can solve the problems of steel fibers prone to corrosion and affect the safety of structural service, and achieve increased hydration efficiency, dense slurry structure, and increased secondary hydration. degree of effect
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Embodiment 1
[0037] 52.5 grade Portland cement 43%, graded quartz sand 48%, microbeads 2% (specific surface area is 3000-5000m 2 / kg), superfine slag powder 3% (the specific surface area is 800-4000m 2 / kg), nano-silica 1.3% (the specific surface area is 160000-200000m 2 / kg), polycarboxylate water reducer 0.6%, polyether defoamer 0.03%, ettringite expansion agent 2%, redispersible latex powder 0.03%, polyacrylamide underwater anti-dispersant 0.04%. After the above materials are mixed evenly, add 9% water of the total mass, stir for 8 minutes, and leave to stand for 3 minutes after the stirring is completed, to obtain the cement-based grouting material of the present invention. The properties of grouting materials at different ages measured under standard curing conditions are shown in Table 1.
[0038] Table 1 Example 1 grouting material physical properties
[0039]
[0040]
[0041] The grouting material prepared in this example meets the technical requirements for offshore wind...
Embodiment 2
[0043] 37% of 42.5 grade marine Portland cement, 2% of 42.5 grade rapid hardening sulfoaluminate cement, 54.5% of graded river sand, 2% of microbeads (specific surface area is 3000-5000m 2 / kg), superfine slag powder 2.5% (specific surface area is 800-4000m 2 / kg), polycarboxylate water reducer 0.2%, polyether defoamer 0.02%, ettringite expansion agent 1.76%, redispersible latex powder 0.02%. After mixing the above materials evenly, add water with a total mass of 11.5%, stir for 5 minutes, and let stand for 2 minutes after the stirring is completed, to obtain the cement-based grouting material of the present invention. The properties of grouting materials at different ages measured under standard curing conditions are shown in Table 2.
[0044] Table 2 Example 2 grouting material physical properties
[0045]
[0046]
[0047] The grouting material prepared in this example has good fluidity and high compressive strength, and the combination of ultrafine slag powder and ...
Embodiment 3
[0049] 43% of 52.5 grade quick-hardening sulfoaluminate cement, 2% of 52.5 grade ordinary Portland cement, 50% of graded river sand, 2% of silica fume (specific surface area is 18000-20000m 2 / kg), superfine slag powder 2.7% (the specific surface area is 800-4000m 2 / kg), polycarboxylate superplasticizer 0.25%, polyether defoamer 0.02%, redispersible latex powder 0.02%, lithium carbonate 0.01%. After mixing the above materials evenly, add water with a total mass of 12%, stir for 4 minutes, and let stand for 3 minutes after the stirring is completed, to obtain the cement-based grouting material of the present invention. The properties of grouting materials at different ages measured under standard curing conditions are shown in Table 3.
[0050] Table 3 Embodiment 3 grouting material physical properties
[0051]
[0052]The 2h compressive strength of the grouting material prepared in this embodiment reaches 28.8MPa, the initial fluidity is high, the early strength is high,...
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