Cement mortar composition for grout and grout mortar obtained from the same
A technology of cement mortar and composition, applied in the field of grouting, to achieve the effects of good fluidity, high durability, high strength and durability
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Embodiment 1
[0067] 100 parts of binding materials contain the fast curing agent shown in table 1 (the amount of cement is to subtract the amount of fast curing agent from 85 parts), 10 parts of pozzolan micropowder, 2.5 parts of expansive material and 2.5 parts of micropowder cement, Then, 0.75 parts of setting retardant, 2.5 parts of shrinkage reducing agent, 0.25 parts of melamine sulfonate-based water-reducer, 0.2 parts of polycarboxylate-based water-reducer, 0.0025 parts of Foam material, 0.003 parts of tackifier and 150 parts of fine aggregate are used to make cement mortar composition for grouting, and then mixed with 34 parts of water with a high-speed manual mixer to make grouting, and measure its fluidity, Bleeding rate, volume expansion rate and compressive strength. The results are summarized in Table 1.
[0068] Materials used:
[0069] Cement: Ordinary Portland cement, density 3.15g / cm 3 , commercially available
[0070] Fast curing agent: Calcium aluminum silicate glass / ...
Embodiment 2
[0093] Except that 100 parts of the bonding material contained 18 parts of the fast curing agent and the pozzolan fine powder shown in Table 2, it was made into grout in the same way as in Example 1, and then measured. The results are summarized in Table 2.
[0094] Table 2
[0095] test
(share) fluidity
(Second) Bleeding rate
(%) volume expansion
Rate(%) 28 days old
(N / mm 2 )
Remark
2-1 0 0.05 +0.30 65.8 comparative example 2-2 5 9.8 0.0 +0.32 64.4 Example 1-5 10 7.4 0.0 +0.48 64.8 Example 2-3 15 6.2 0.0 +0.54 64.5 Example
[0096] - can not be determined
[0097] As can be seen from Table 2, the grouting of the embodiment containing pozzolanic powder has good fluidity, no bleeding, low shrinkage, and high compressive strength (test No.2-2, 1-5, 2-3 ). On the contrary, the grout of the comparative example ...
Embodiment 3
[0099] Except that 100 parts of the bonding material contained 18 parts of the fast curing agent, and the setting retarder shown in Table 3 was added to 100 parts of the bonding material, the grouting was performed in the same manner as in Example 1, and then measured. The results are summarized in Table 3.
[0100] table 3
[0101] test
[0102] It can be seen from Table 3 that the grouting of the example with the addition of the coagulation retarder has good fluidity, no bleeding, proper coagulation time, and high compressive strength.
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