Method for solving sugaring problem of cement concrete by using bentonite
A technology of cement concrete and bentonite, which is applied in the field of using bentonite to solve the sanding of cement concrete, can solve problems such as incompatibility of organic matter and inorganic matter, and achieve the effects of improving construction workability, improving project quality and reducing environmental pressure.
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Embodiment 1
[0014] There is an existing Φ3.5×48m dry-process rotary kiln manufacturer, the main product is 32.5 grade cement, the cement admixture is slag, fly ash, limestone 1:1:1, the total amount of admixture is 48% on average, and the finished product Cement fineness 80um sieve <6%, standard consistency 23.2%, average initial setting time 142 minutes, final setting time average 208 minutes, 3d average compressive strength 15.8MPa, flexural 1.7MPa, 28-day average compressive strength 35.2MPa , Anti-bending 3.6MPa, when used, the cement does not have slurry, bleeds, poor adhesion, serious sanding on the surface, many cracks, and many users have criticized it.
[0015] Use the method of the present invention to mix in cement grinding, and buy bentonite dried by villagers as a modified water-retaining component. The content of montmorillonite is 76%. The price is 52 yuan / t lower than 21 yuan / t, 5% bentonite is used to replace 5% admixture, and the ingredients are ground according to the o...
Embodiment 2
[0017] There is an existing Φ4×64m dry-process rotary kiln production enterprise. The production process is to grind clinker and admixture into clinker powder and slag powder respectively, and then blend them in a certain proportion to produce 42.5 grade and 32.5 grade finished cement. The blending material of grinding slag powder is slag, coal cinder, fly ash, limestone 2:1:2:1, and it is made by grinding with 5% gypsum ingredients. The calculation cost of slag powder is 126 yuan / t, and its main product is civil The average dosage of 32.5 grade cement slag powder is 52%, clinker powder is 48%, and the standard consistency is 23.5%. The average initial setting time is 161 minutes, and the average final setting time is 227 minutes. 1.9MPa, 28-day average strength compressive strength 36.4MPa, flexural resistance 3.6MPa, when used, the cement does not grout and bleeds, the surface is severely sanded, there are many tortoises and cracks, and users often complain.
[0018] Use the...
Embodiment 3
[0020] There is an existing masonry ash production enterprise whose main product is masonry cement. The ingredients of masonry cement are 15% clinker, 25% slag, 25% slag, 10% lime slag, and 25% limestone. The finished masonry cement finely ground The sieve residue of 80μm is less than 12%, the standard consistency is 23.2%, the average initial setting time is 242 minutes, and the average final setting time is 307 minutes. Fold 1.4MPa. Users reported that the masonry cement does not have slurry when it is used, severe bleeding, poor adhesion, serious sanding on the surface, many cracks and easy shelling, which is often criticized by users and difficult to promote.
[0021] The factory price of dry bentonite is 33 yuan / t, and the average montmorillonite content is 86%, which is 15 yuan / t lower than the comprehensive average price of slag, slag and gravel slag, which is 48 yuan / t. According to the original process, the bentonite equivalent to 15% of the total weight of cement In...
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