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A concrete product, ultra-high-performance technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of reducing the mechanical properties of concrete, not having potential hydraulicity, reducing the fluidity of concrete, etc., to achieve Reduce the risk of shrinkage cracking and deformation, increase the difficulty of construction, and reduce the effect of fluidity
Inactive Publication Date: 2020-10-30
深圳市汉工造技术有限公司
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Problems solved by technology
[0004] The existing technology directly mixes lithium slag with cement, sand, etc. to prepare concrete. Lithium slag is loose, has strong water absorption, increases water consumption, and has no potential hydraulicity. This method reduces the fluidity of concrete and reduces the mechanical properties of concrete.
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Embodiment 1
[0021] Embodiment one: take by mass parts:
[0022]
[0023] Its concrete preparation steps are as follows:
[0024] ①Put the redispersible latex powder into the mixer, gradually add lithium slag, stir evenly, add active powder and stir evenly;
[0025] ② Add water reducer and defoamer to water and stir to obtain a mixed solution, add 80% of the mixed solution to the dry powder stirred in the first step and stir for 10-25 minutes, add the remaining mixed solution, and stir for 3-5 minutes;
[0026] ③Slowly add fiber and stir evenly;
[0027] ④ Mix the stirred slurry with cement and sand in pouring or jetting molds, and demould after 24 hours to obtain ultra-high toughness self-curing cement-based products.
Embodiment 2
[0028] Embodiment two: take by mass parts:
[0029]
[0030]
[0031] Its concrete preparation steps are as follows:
[0032] ①Put the redispersible latex powder into the mixer, gradually add lithium slag, stir evenly, add active powder and stir evenly;
[0033] ② Add water reducer and defoamer to water and stir to obtain a mixed solution, add 80% of the mixed solution to the dry powder stirred in the first step and stir for 10-25 minutes, add the remaining mixed solution, and stir for 3-5 minutes;
[0034] ③Slowly add fiber and stir evenly;
[0035] ④ Mix the stirred slurry with cement and sand in pouring or jetting molds, and demould after 24 hours to obtain ultra-high toughness self-curing cement-based products.
[0036] The invention uses dispersible latex powder to pretreat lithium slag, utilizes the hydrophobicity of organic groups to reduce the water absorption of lithium slag during concrete mixing, and then the dispersible latex powder is redispersed when it m...
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Abstract
The invention discloses a lithium slag modified ultra-high performance concrete product and a preparation method thereof, wherein the lithium slag modified ultra-high performance concrete product is aflat plate or hyperboloid member with a thickness of 15-50 mm, and comprises the components: cement, sand, active powder, lithium slag, fibers, redispersible latex powder, a water reducing agent, anantifoaming agent and water. The lithium slag is pretreated by adopting the dispersible latex powder, and the hydrophobicity of organic groups is utilized, so the water absorption of the lithium slagin the concrete stirring process is reduced; then, the dispersible latex powder is dispersed when meeting water, moisture enters the pores of the lithium slag, so a free water reserve is formed, the water retention effect is achieved, and evaporation of water is reduced; the water retention effect can also be achieved through redispersion and film formation of the redispersible latex powder, early-stage dehydration shrinkage and deformation of an ultra-high performance concrete product are reduced, and meanwhile the synergistic effect of the lithium slag and other active components on the mechanical property of the ultra-high performance concrete is achieved.
Description
technical field [0001] The invention relates to the technical field of building materials, in particular to a lithium slag modified ultra-high performance concrete product and a preparation method thereof. Background technique [0002] With the development of new energy materials, a large amount of lepidolite lithium slag is produced in the country. If it is not used effectively, it will not only occupy a large amount of land resources, but also cause serious pollution to the environment. Lithium slag is an admixture with high pozzolanic activity, and its color is light white or white. It is a high-quality material for preparing ultra-high performance concrete. [0003] The chemical composition of lithium slag is mainly silica and alumina, which has high potential pozzolanic activity. Using lithium slag and mineral powder as admixtures of ultra-high performance concrete is beneficial to improve the performance of ultra-high performance concrete and reduce the Cost and impro...
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Application Information
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