Delayed coagulation Portland cement for road base layer and production method
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A technology of retarded silicate and road base, applied in cement production, etc., can solve problems such as unreasonable proportion of ingredients, inability to be used as road base, and inconspicuous social benefits, so as to achieve obvious social benefits, increase popularity and reputation Effect
Inactive Publication Date: 2019-03-22
DATONG JIDONG CEMENT CO LTD
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[0004] The formula currently used in the production of ordinary Portland cement is: clinker 80.00%, desulfurized gypsum 5.00%, limestone 3.00%, slag 6.00%, fly ash 6.00%, grinding aid 0.040%. The functional properties of cement, such as frost resistance, crack resistance, seepage resistance, impact and wear resistance, and erosion resistance, do not meet the requirements, so it cannot be used as a road base layer, and the social benefits are not obvious
There is no report on the production method of retarded Portland cement for road base
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Embodiment 1
[0024] A kind of slow-setting Portland cement for road base, comprising the following raw materials in mass percentage: 45% of clinker, 11% of desulfurized gypsum, 11% of limestone, 8% of slag, 25% of fly ash, grinding aid (retarding type )0.8%.
[0025] Based on the above raw material ratio, a production method of retarded portland cement for road base is provided, comprising the following steps:
[0026] Step 1: Clinker, desulfurized gypsum, limestone, slag and fly ash are crushed and pre-homogenized, and after grinding, traditional methods are used to prepare raw materials;
[0027] Step 2: preheating and partially decomposing the raw meal in the above steps through a cyclone preheater;
[0028] Step 3: After the raw meal is preheated and pre-decomposed in the cyclone preheater, it enters the next process;
[0029] Step 4: Enter the cement rotary kiln to burn the clinker. In the rotary kiln, the carbonate is further decomposed rapidly and sends a series of solid-phase rea...
Embodiment 2
[0032] A kind of slow-setting Portland cement for road base, comprising the following raw materials in mass percentage: 50% of clinker, 7% of desulfurized gypsum, 7% of limestone, 6% of slag, 30% of fly ash, grinding aid (retarding type )0.8%.
[0033] The production method of this embodiment is the same as that of Embodiment 1, so it will not be repeated.
Embodiment 3
[0035] A kind of slow-setting portland cement for road base, comprising the following raw materials in mass percentage: 55% of clinker, 3% of desulfurized gypsum, 3% of limestone, 4% of slag, 35% of fly ash, grinding aid (retarding type )0.8%.
[0036] The production method of this embodiment is the same as that of the above embodiment, so it will not be described in detail.
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Abstract
The invention discloses delayed coagulation Portland cement for a road base layer and a production method. The delayed coagulation Portland cement comprises the following raw materials in percentage by mass: 50% of clinker, 7% of flue gas desulfurization gypsum, 7% of limestone, 6% of slag, 30% of coal ash and 0.8% of grinding aids. The production method comprises the following steps: crushing theclinker, the flue gas desulfurization gypsum, the limestone, the slag and the coal ash, pre-homogenizing, carrying powder grinding, and making a crude material by using a conventional method; preheating and partially decomposing the crude material by using a cycle preheater; sintering in a cement rotary furnace so as to obtain clinker, further rapidly decomposing carbonate in the rotary furnace,and carrying out a series of solid phase reactions; putting the cement clinker and the grinding aids into a ball mill, and finally milling the cement clinker into appropriate granularities by using the ball mill. By adopting the delayed coagulation Portland cement for the road base layer, multiple use function property requirements such as freezing resistance, cracking resistance, permeation resistance, impact resistance, wearing resistance and erosion resistance of the cement can be ensured, resources can be comprehensively utilized, and remarkable social benefits can be made.
Description
technical field [0001] The invention relates to the technical field of preparation of retarded Portland cement, in particular to a retarded Portland cement for road bases and a production method thereof. Background technique [0002] With the rapid development of high-grade highway traffic modernization, cement concrete pavement has become one of the development directions of road construction. [0003] However, due to the long process time of mixing materials, paving, and compacting in road construction, generally according to construction requirements, the initial setting time of cement should be greater than 4 hours, and the final setting time should not be less than 6 hours. Therefore, road cement or retarded setting should be used for cement concrete road construction. Cement or retarded admixtures. [0004] The formula currently used in the production of ordinary Portland cement is: clinker 80.00%, desulfurized gypsum 5.00%, limestone 3.00%, slag 6.00%, fly ash 6.00%,...
Claims
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