Anchoring grouting material as well as preparation method and application thereof
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A grouting material and anchoring technology are applied in the fields of anchoring grouting materials, anchoring grouting materials and their preparation, and can solve problems such as failure to meet the requirements of anchoring and grouting in supporting engineering.
Active Publication Date: 2012-06-20
CNBM ZHONGYAN TECH +1
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Therefore, in winter, ordinary cement mortar cannot meet the anchoring gro
Method used
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[0037] The present invention also provides a method for preparing the above-mentioned anchoring grouting material, comprising the following steps:
[0038] 1) Take the raw materials according to the above-mentioned raw material formula;
[0039] 2) Mix the water-retaining agent, gypsum, silica fume, water-reducing agent, quick-setting agent and retarder with a mixer first, then put in the rest of the materials, and mix them with a mixer to obtain the anchoring grouting material.
[0040] The purpose of mixing water retaining agent, gypsum, silica fume, water reducer, accelerator and retarder first is to prevent uneven mixing of a small amount of components directly into a large number of components, and reduce the adhesion of a small amount of components in the production process. The possibility of damage caused by the inner wall of the equipment.
[0041] The stirring time in the step 2) is preferably 15-25 minutes. Too long time will cause stratification of components with...
Embodiment 1-10
[0045] Embodiment 1-10 Preparation of anchoring grouting material
[0046] The preparation method of anchoring grouting material of the present invention, comprises the following steps:
[0047]1) Take the raw materials by weighing the raw material formula shown in Table 1;
[0048] 2) First mix gypsum, silica fume, water reducer, accelerator, retarder and water retention agent with a small mixer, then put in the rest of the materials, and stir for 15-25 minutes with a gravity-free mixer to obtain anchor grouting Material. The main parameters in the preparation methods of Examples 1-10 are shown in Table 1.
[0049] The formula of table 1 embodiment 1-10 anchoring grouting material and the main parameter of preparation method (formulation unit: parts by weight)
[0050]
[0051]
[0052]
[0053] The measurement unit of parts by weight can be kilogram or its multiple values.
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Abstract
The invention discloses an anchoring grouting material as well as a preparation method and an application of the anchoring grouting material. The raw material reciple of the anchoring grouting material comprises the following ingredients in parts by weight: 40 to 50 parts of special clinkers, 40 to 50 parts of high-intensity aggregate, 6 to 8 parts of gypsum, 2 to 4 parts of silicon ash, 0.2 to 0.7 part of water reducing agents, 0.02 to 0.08 part of setting accelerators, 0.02 to 0.06 part of setting retarders and 0.01 to 0.03 part of water-retaining agents. Detection results show that the initial flow rate of the materials is smaller than 20 seconds in the low temperature state of -20 DEG C to 0 DEG C, the flow rate after 20 seconds is smaller than 30 seconds, the pressure resistant intensity in 3 hours is greater than 20MPa, in addition, the pressure resistant intensity in 3 days is higher than 50MPa, the limit expansion rate in 7 days is greater than 0.01 percent, the micro expansion performance is realized, in addition, the viscosity is low, the permeability is good, a good reinforcing effect is also realized on a soil layer, the anchoring grouting material can be used for anchoring anchor cables or anchor rods in underground support protection engineering such as subway, tunnels and the like in low-temperature environment (in winter), and application prospects are wide.
Description
technical field [0001] The invention belongs to the anchoring grouting material in the field of building materials, and in particular relates to an anchoring grouting material used for quickly anchoring anchor cables and anchor rods in a low-temperature environment in winter, as well as a preparation method and application thereof. Background technique [0002] In the support construction process of underground projects such as subways and tunnels, anchor cables and anchor rods are generally anchored by pouring cement mortar. However, ordinary cement mortar (such as 50 parts of PO42.5 cement by weight, 50 parts of fine sand, and 1 part of naphthalene-based superplasticizer) has a slow setting time under high fluidity, even at normal ambient temperature. The early strength is low and the waiting time for tension locking is long. In the north, especially in winter, the ambient temperature is low and the low temperature lasts for a long time. At low temperatures, ordinary cem...
Claims
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