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A kind of preparation method of hydraulic gelling material
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A hydraulic gelling and hard technology, applied in the field of cement-based materials, can solve the problems of poor adaptability of admixtures, limited industrialization promotion, and difficult to be widely used, and achieve excellent fireproof and thermal insulation performance, reduce production costs, and save energy.
Active Publication Date: 2016-08-17
HOHAI UNIV
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[0005] Chinese patent CN201310110697.3 discloses a "preparation method of low-temperature firing hydraulic cementitious material". The cementitious material has early strength, and a large amount of waste is used to reduce production energy consumption. However, the early coagulation is too fast and the later strength is not enough , and poor adaptability to admixtures, it is difficult to be widely used in practical engineering
However, the early condensation is too fast, the operation is difficult in practical application, and the cost is high, which limits the promotion of industrialization
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Embodiment 1
[0026] ①The above-mentioned components are mixed according to the weight ratio, wherein:
[0027] 36 parts of recycled cement, 49 parts of water-quenched slag, 6 parts of calcined anhydrite, 4 parts of potassium dihydrogen phosphate, and 5 parts of metakaolin.
[0028] ② Use a pulverizer to coarsely pulverize the above mixture into particles with a particle size of less than 2.5mm.
[0029] ③Use a fine grinder to further grind the particles to a fineness of 370m 2 / kg.
Embodiment 2
[0031] ①The above-mentioned components are mixed according to the weight ratio, wherein:
[0032] 35 parts of recycled cement, 50 parts of water-quenched slag, 6 parts of anhydrite calcined product, 3 parts of sodium dihydrogen phosphate, and 6 parts of alumite calcined powder.
[0033] ② Use a pulverizer to coarsely pulverize the above mixture into particles with a particle size of less than 3mm.
[0034] ③Use a fine grinder to further grind the particles to make the fineness 380m 2 / kg.
Embodiment 3
[0036] ①The above-mentioned components are mixed according to the weight ratio, wherein:
[0037] 37 parts of recycled cement, 46 parts of water-quenched slag, 8 parts of anhydrite calcined product, 2 parts of ammonium dihydrogen phosphate, and 7 parts of alumite calcined powder.
[0038] ② Use a pulverizer to coarsely pulverize the above mixture into particles with a particle size of less than 3.5 mm.
[0039] ③Use a fine grinder to further grind the particles to make the fineness 390m 2 / kg.
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Abstract
The invention discloses a preparation method of hydraulic cementing material, belonging to the field of a cement-based material. The preparation method comprises the following step: commonly grinding the following raw materials in parts by weight: 35-40 parts of regenerative cement, 40-50 parts of water quenching slag, 6-8 parts of gypsum, 2-4 parts of modifiers and 5-10 parts of hydrated calcium melilite conversion agents, to obtain the hydraulic cementing material with specific surface area of 360m<2> / kg-400m<2> / kg, besides suitable cementing characteristic and early strength, the late strength of the hydraulic cementing material is stably increased, and the anti-carbonization property and waterproof property of clinker-free cement can be improved. For the hydraulic cementing material, the mortar breaking strength in 28 days is 8-10MPa, the compressive strength is greater than 45MPa, the mortar, concrete and products are endowed with excellent anti-penetrability performance, harmful ion erosion resistance performance and fire resistance performance, and the hydraulic cementing material is applicable to pavement of a roadbed, production of fireproof thermal-insulating building materials, residential smoke exhaust flues and dry-mixed mortar, and curing of heavy metal ions.
Description
technical field [0001] The invention relates to a preparation method of a hydraulic cementitious material, which belongs to the field of cement-based materials. Background technique [0002] In my country, cement and concrete are the two pillar industries in the field of construction. According to China Building Materials Federation and national statistics, in 2013 my country's annual cement output reached 2.41 billion tons, and concrete output reached 2.196 billion cubic meters. At the same time, with the acceleration of urbanization in our country, the construction industry has entered a stage of rapid development, and a large number of old buildings have reached the end of their service life, or need to be demolished due to other factors. The service life of general concrete is 50 to 100 years, and the concrete projects built in the early days of the founding of our country have gradually entered the demolition period. According to incomplete statistics, a total of 150 ...
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Application Information
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