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Accelerator applicable to shotcrete and preparation method thereof
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A technology of shotcrete and quick-setting agent, applied in the field of concrete construction, can solve the problems of low strength and high rebound rate, and achieve the effects of high compressive strength, low rebound rate and improving initial setting time.
Active Publication Date: 2019-12-13
THE FOURTH ENG CO LTD OF CCCC FIRST HIGHWAY ENG +2
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Problems solved by technology
[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a quick-setting agent suitable for shotcrete and a preparation method thereof, which solves the problem that the shotcrete used for tunnel construction in the prior art has a high rebound rate when it is used, and The problem of low strength after molding
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Embodiment 1
[0029] This embodiment provides a kind of accelerator suitable for sprayed concrete, including component A and component B, the material composition in component A: CaO·AI 2 o 3 2kg, 4CaO·AI 2 o 3 · Fe 2 o 3 5kg, CaO·SiO 2 4kg, AI 2 o 3 5kg, Na 3 C 6 h 5 o 7 2H 2 O is 1kg, PDMS is 5kg, SPEOT is 3kg, TEOA is 3kg, H 2 O is 50kg;
[0030] The material composition in the component B: NaOH is 22kg, AI(OH) 3 28kg, C 6 h 8 o 7 ·H 2 O is 2kg, Na 2 O·10SiO 2 3kg, H 2 O is 46kg.
[0031] The weight ratio between component A and component B is 2:1.
Embodiment 2
[0033] This embodiment provides a kind of accelerator suitable for sprayed concrete, including component A and component B, the material composition in component A: CaO·AI 2 o 3 3kg, 4CaO·AI 2 o 3 · Fe 2 o 3 5kg, CaO·SiO 2 3kg, AI 2 o 33kg, Na 3 C 6 h 5 o 7 2H 2 O is 0.5kg, PDMS is 7kg, SPEOT is 2kg, TEOA is 2kg, H 2 O is 45kg;
[0034] The material composition in the component B: NaOH is 20kg, AI(OH) 3 31kg, C 6 h 8 o 7 ·H 2 O is 1kg, Na 2 O·10SiO 2 4kg, H 2 O is 40kg.
[0035] The weight ratio between component A and component B is 1:1.
Embodiment 3
[0037] This embodiment provides a kind of accelerator suitable for sprayed concrete, including component A and component B, the material composition in component A: CaO·AI 2 o 3 2kg, 4CaO·AI 2 o 3 · Fe 2 o 3 6kg, CaO·SiO 2 5kg, AI 2 o 3 7kg, Na 3 C 6 h 5 o 7 2H 2 O is 1.2kg, PDMS is 6kg, SPEOT is 2kg, TEOA is 4kg, H 2 O is 60kg;
[0038] The material composition in the component B: NaOH is 23kg, AI(OH) 3 35kg, C 6 h 8 o 7 ·H 2 O is 3kg, Na 2 O·10SiO 2 2kg, H 2 O is 50kg.
[0039] The weight ratio between component A and component B is 2:3.
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Abstract
The invention discloses an accelerator applicable to shotcrete and a preparation method thereof. The accelerator comprises a component A and a component B. The component A comprises the following materials: 2 to 4 parts of CaO.AI2O3, 4 to 6 parts of 4CaO.AI2O3.Fe2O3, 3 to 5 parts of CaO.SiO2, 3 to 7 parts of AI2O3, 0.5 to 1.5 parts of Na3C6H5O7.2H2O, 4 to 7 parts of PDMS, 2 to 3 parts of SPEOT, 2to 4 parts of TEOA and 40 to 60 parts of H2O. The component B comprises the following materials: 20 to 23 parts of NaOH, 25 to 35 parts of AI(OH)3, 1 to 3 parts of C6H8O7.H2O, 2 to 5 parts of R2O.nSiO2 and 40 to 50 parts of H2O. A mass ratio of the component A to the component B is 2: (1-3). The detection data parameter of the accelerator is that a rebound rate is less than or equal to 5%. According to the accelerator provided by the invention, the component A and the component B are mixed for use; 20-30% of economic cost can be saved; the advantage that the rebound rate of the shotcrete is smaller than 5% is obtained; the quick setting time of the shotcrete is shortened; and construction progress is greatly improved.
Description
technical field [0001] The invention belongs to the technical field of concrete construction, and in particular relates to an accelerator suitable for sprayed concrete and a preparation method thereof. Background technique [0002] With the rapid construction of infrastructure in our country this year, tunnel construction, as a kind of building construction, is more difficult than other construction methods. In the history of the development of tunnel construction technology, the "New Austrian Method" construction method invented by the Austrian scholar Rabsiewicz in the 1950s was generally adopted at home and abroad. This method uses anchor rods and shotcrete to support the surrounding rock. The injection layer and the surrounding rock are closely combined to form a support system. After more than 60 years, most tunnels around the world still use this method for construction. The sprayed concrete used in this shield tunneling construction method has developed from dry oper...
Claims
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Application Information
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