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A technology of concrete and activator, applied in the field of building materials, can solve the problems of increasing the turnover demand of formwork, difficult to popularize and apply, long setting time, etc., and achieve the effects of shortening setting time, saving cost and improving early strength
Inactive Publication Date: 2011-02-09
NANJING RUIDI HIGH TECH
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However, due to the above-mentioned problems, large-volume ground slag concrete is difficult to be popularized and applied in urban commercial concrete mixing plants and cast-in-place projects, and due to the long setting time and low early strength, the turnover of formwork during construction is increased. Demand
[0004] This invention aims at the problems of long setting time and low early strength of the large-volume ground slag concrete itself, and develops a compound with comprehensive properties such as water reduction, faster setting time, and early strength improvement added during concrete construction. High-efficiency liquid activator, its use method is simple and its effect is good
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Embodiment 1
[0020] Naphthalene superplasticizer: 15%
[0021] Aluminum sulfate: 15%
[0022] Triethanolamine: 0.05%
[0023] Air content regulator: 0.2%
[0024] Hydroxy compound 0.012%
[0025] Water: 69.74%
[0026] Table 1-Table 2 shows the mixing ratio and properties of large-volume ground-slag concrete prepared by mixing 5% of the amount of cementitious material with the liquid large-volume ground-fine slag concrete activator prepared in this example.
[0027] Table 1 Concrete mix ratio and mixture properties
[0031] It can be seen from Tables 1 to 2 that after adding a large amount of liquid ground slag activator, the ground slag in the concrete cementitious material system increases from 40% to 60%, and the setting time of concrete, the early strength of concrete and the later Intensity was basically unchanged. The setting time of 60% ground slag concrete without liquid activator i...
Embodiment 2
[0032] Embodiment 2 is substantially the same as Embodiment 1, but the formula is:
[0033] Naphthalene superplasticizer: 15%
[0034] Aluminum sulfate: 10%
[0035] Air content regulator: 0.2%
[0036] Water: 74.8%
Embodiment 3
[0037] Embodiment 3 is substantially the same as Embodiment 1, but the formula is:
[0038] Sulfamate superplasticizer: 45%
[0039] Aluminum sulfate: 13%
[0040] Triethanolamine: 0.05%
[0041] Air content regulator: 0.2%
[0042] Hydroxy compounds: 0.01%
[0043] Water: 41.74%
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Abstract
The invention discloses a liquid concrete activator which is made from the following raw materials according to mass percentage: superplasticizer 10-60%, aluminum sulfate 5-20%, triethanolamine 0.05-0.2%, slump-retaining agent 0-6%, gas content regulator 0-0.4%, hydroxyl compounds 0-0.02%, and water 30-77%. With the use of the inventive liquid concrete activator, the addition amount of ground slag in concrete is increased from 20-40% to 50-70% and the solidification and curing of concrete with a large amount of ground slag are accelerated, so that the concrete is similar in curing time and early strength to the common concrete, thereby facilitating the construction application. The invention can reduce the requirement for cement in concrete material, and also greatly improve the durability of concrete (e.g. resistance to sulphate corrosion and chloride ion corrosion) since the additional amount of ground slag in the concrete system is increased.
Description
technical field [0001] The invention belongs to the technical field of building materials and relates to the preparation of a liquid concrete activator. Background technique [0002] When concrete is faced with problems such as chloride ion corrosion and sulfate corrosion, it is often necessary to add a large amount of finely ground slag to the cementitious material system to prepare high-performance concrete. A number of indoor studies and field construction experience show that in concrete After adding more than 50% of finely ground slag, the setting time of concrete is greatly prolonged, and there is a problem of low early strength. [0003] Adding a large amount of ground slag to concrete can improve the durability of concrete and reduce the amount of cement in concrete, promote the development of circular economy, reduce environmental pollution and the consumption of resources by the cement industry. However, due to the above-mentioned problems, large-volume ground sla...
Claims
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Application Information
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