Nano-based early strength type compound polycarboxylate water reducer and preparation method thereof
A composite polycarboxylate, early-strength type technology, applied in the field of nano-based early-strength composite polycarboxylate water reducer and its preparation, can solve the negative effect of concrete durability, it is difficult to get rid of steam curing and pressure steaming, equipment Increased investment and other issues, to achieve the effect of reducing the amount of use, no pollution in the preparation process, and reducing the expenditure of the component factory
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Embodiment 1
[0036] The preferred embodiment 1 of the present invention provides a nano-based early-strength composite polycarboxylate water reducer, which is prepared from the following raw materials in mass percentage:
[0037] Early-strength polycarboxylate superplasticizer 18%;
[0038] Nano early strength agent 2%;
[0039] Workability regulator 0.05%;
[0040] Active stimulator 1%;
[0041] Complex stabilizer 0.5%;
[0042] Defoamer 0.04%;
[0043] The balance is water.
[0044]Wherein, the viscosity-average molecular weight of the early-strength polycarboxylate superplasticizer is 29688, the mass concentration is 40%, and the general structural formula is:
[0045]
[0046] In the formula, a:b:c is 10:1:1;
[0047] where M is
[0048] where R 1 for H, R 2 for NH 2 , R 3 for CH 2 , n=120.
[0049] The preparation method of the nano-accelerated strength agent is as follows: at 25 ° C, 0.2 parts of the early-strength polycarboxylate superplasticizer are stirred and di...
Embodiment 2
[0056] The preferred embodiment 2 of the present invention provides a nano-based early-strength composite polycarboxylate water reducer, which is prepared from the following raw materials in mass percentage:
[0057] Early-strength polycarboxylate superplasticizer 22%;
[0058] Nano early strength agent 4%;
[0059] Workability modifier 0.1%;
[0060] Active stimulator 3%;
[0061] Complex stabilizer 1.5%;
[0062] Defoamer 0.1%;
[0063] The balance is water.
[0064] Wherein, the viscosity-average molecular weight of the early-strength polycarboxylate superplasticizer is 20056, the mass concentration is 40%, and the general structural formula is:
[0065]
[0066]
[0067] where R 1 for H, R 2 for NH-C(CH 3 ) 2 -CH 2 -SO 3 H, R 3 for CH 2 -CH 2 , n=150.
[0068] The preparation method of the nano-accelerated strength agent is as follows: at 25 ° C, 0.5 parts of early-strength polycarboxylate superplasticizer is stirred and dissolved in deionized water, a...
Embodiment 3
[0075] The preferred embodiment 3 of the present invention provides a nano-based early-strength composite polycarboxylate water reducer, which is prepared from the following raw materials in mass percentage:
[0076] Early-strength polycarboxylate superplasticizer 25%;
[0077] Nano accelerator 5%;
[0078] Workability modifier 0.05%;
[0079] Active stimulator 3%;
[0080] Complex stabilizer 0.5%;
[0081] Defoamer 0.04%;
[0082] The balance is water.
[0083] Wherein, the viscosity-average molecular weight of the early-strength polycarboxylate superplasticizer is 29688, the mass concentration is 40%, and the general structural formula is:
[0084]
[0085] In the formula, a:b:c is 10:2:1;
[0086] where M is
[0087] where R 1 for CH 3 , R 2 for NH 2 , R 3 for CH 2 , n=150.
[0088] The preparation method of the nano-accelerated strength agent is as follows: at 30 ° C, 0.2 parts of the early-strength polycarboxylate superplasticizer are stirred and dissol...
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