Shale ceramsite fiber concrete
By adding shale ceratops fibers and glass fibers to light aggregate concrete, shale ceratops fiber concrete with strength grades C30-C50 was prepared, which solved the self-weight and strength problems of traditional concrete in high-rise buildings and large-span bridges. , realizes lightweight and high strength of concrete, and has good construction properties.
Patent Information
- Application Number
- CN202311052044.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-18
- Publication Date
- 2025-02-21
AI Technical Summary
In the prior art, the application proportion of structural light aggregate commercial concrete in my country is low, resulting in challenges in self-weight and strength of high-rise buildings and large-span bridges, especially in the application of high-rise buildings and large-span bridges, traditional ordinary concrete Difficult to meet engineering needs.
By adding shale ceratops fibers to light aggregate concrete and adjusting the mix ratio, shale ceratops fiber concrete with strength grades C30-C50 is prepared, and reinforced with glass fibers to improve the tensile and shear resistance of the concrete. strength.
This technology significantly reduces the apparent density of concrete, reduces the weight of the building, and at the same time improves the load-bearing capacity of the building, enhances the strength of the concrete, and has excellent construction properties, which can be directly pumped for construction, reducing the complexity of stirring .
Smart Images
Figure CN119490333A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to shale ceramsite fiber concrete and belongs to the technical field of building materials. Background Art
[0002] At present, the proportion of structural lightweight aggregate commercial concrete in my country is relatively low. Only a small number of high-rise buildings and bridges use cast-in-place structural lightweight aggregate commercial concrete to reduce their own weight. This is also one of the reasons why my country's high-strength structural ceramsite production is relatively small and of low quality. The proportion of structural lightweight aggregate commercial concrete in the United States has reached 35%, with an annual output of about 22 million m3, and the technology is world-leading.
[0003] At present, my country's industrial structure is in a period of in-depth adjustment. The country is vigorously promoting the industrialization of housing. The labor cost of construction has increased. Prefabricated construction products will be widely used. And with the increase of building height and bridge span, it is becoming more and more difficult to use traditional ordinary concrete. Lightweight aggregate concrete has a wide range of application prospects in projects such as large-span structures, high-rise buildings, soft soil foundations and earthquake-prone areas due to its light weight, high strength and multifunctional characteristics. In order to improve the performance of lightweight aggregate concrete and enhance its tensile and shear strength, it is very important to add fiber to lightweight aggregate concrete for reinforcement. Summary of the invention
[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a shale ceramsite fiber concrete, which is a kind of lightweight aggregate concrete and is mainly used in high-rise, large-span buildings and marine engineering in my country.
[0005] A shale ceramsite fiber concrete, characterized in that it comprises the following components: 306-452kg of cement, 622-826kg of sand, 508-620kg of lightweight aggregate, 196-240kg of water, and 0.1% of glass fiber.
[0006] The concrete is characterized in that lightweight aggregate concrete with a strength grade ranging from C30 to C50 can be obtained by adjusting the mix ratio.
[0007] The concrete is characterized in that its sand ratio is 0.50-0.62 and its slurry-to-aggregate ratio is 0.38-0.52.
[0008] The concrete is characterized in that the fineness modulus of the sand is 2.73, the apparent density of the sand is 2630 kg / m3, and the lightweight aggregate is lightweight shale ceramsite.
[0009] The concrete is characterized in that the lightweight aggregate is lightweight shale ceramsite with a particle size of 5-10 mm.
[0010] The concrete is characterized in that the cement is silicate cement with a strength grade of 42.5
[0011] The present invention has the following advantages:
[0012] A. Greatly reduce the apparent density of concrete
[0013] The relative density of the lightweight aggregate used in the present invention is lower than that of the concrete obtained by using granite crushed stone, and its apparent density is reduced by more than 20% compared with the concrete obtained by using granite crushed stone. Under the condition of the same structural section, the weight of the concrete is greatly reduced, and the bearing capacity of the building is improved at the same time.
[0014] B. Excellent construction performance
[0015] The invention can be directly pumped for construction without adding an admixture, thereby reducing the complexity of mixing and providing better working performance of the concrete.
[0016] C. Increased the strength of concrete
[0017] At present, the general view in the society on lightweight aggregate concrete is that the strength is insufficient. The present invention adds fiber reinforcement to lightweight aggregate concrete to enhance the strength of the concrete. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The aggregate of Example 1 is a lightweight shale ceramsite with a particle size of 5-10 mm;
[0019] Figure 2 The aggregate is the aggregate of Example 1, which is granite crushed stone with a particle size of 5-15 mm.
[0020] Figure 3 The reinforcing fiber of Example 1 is glass fiber. DETAILED DESCRIPTION
[0021] The present invention will be further described with reference to examples.
[0022] Embodiment 1:
[0023] As shown in Table 1 below, this is the formula for C30, C40, and C50 strength when the coarse aggregate is 5-10 mm lightweight aggregate, and the C60 concrete formula when the coarse aggregate is granite crushed stone with a particle size of 5-15 mm.
[0024] Table 1
[0025]
[0026] The above-mentioned parts by mass of cement, sand and lightweight aggregate are put into a mixer and stirred evenly, and then the above-mentioned parts by mass of water are added and stirred to obtain the concrete.
[0027] The mechanical properties of concrete of each strength grade measured at 28 days of age are shown in Table 2.
[0028] Table 2
[0029]
[0030] By adjusting the mix ratio, we can obtain shale ceramsite lightweight aggregate concrete with strength grade C30-C50. Compared with granite crushed stone concrete, its mechanical properties are significantly lower than that of granite crushed stone concrete, and its density is 21.4%-23.7% lower than that of granite crushed stone concrete, indicating that using shale ceramsite instead of granite crushed stone as coarse aggregate of concrete can greatly reduce the weight of concrete. Its slump is significantly greater than that of granite crushed stone concrete, and its working performance is better; at the same time, its elastic modulus is also significantly lower than that of granite concrete, while there is no significant difference in Poisson's ratio.
[0031] By adjusting the mix ratio, shale ceramsite lightweight aggregate fiber concrete with strength grade of C30-C50 can be obtained. Compared with granite crushed stone fiber concrete, its mechanical properties are significantly lower in elastic modulus and density than granite crushed stone fiber concrete, and its density is 22.3%-25.1% lower than that of granite crushed stone fiber concrete, while its slump is significantly greater than that of granite crushed stone fiber concrete, with better working performance and no significant difference in Poisson's ratio.
[0032] Compared with Example 1, the splitting tensile strength and elastic modulus of the shale ceramsite fiber concrete of the same strength grade in Example 2 are both smaller than those of the shale ceramsite fiber concrete in Example 1. It can be seen that the two different particle sizes of shale ceramsite lightweight aggregates have a greater influence on the splitting tensile strength and elastic modulus.
[0033] The above description is only the basic principle of the present invention and does not impose any limitation on the present invention. Any equivalent changes and modifications made thereto according to the present invention are within the scope of the protection scheme of this patent technology.
Claims
1. A shale ceramsite fiber concrete, characterized in that: It includes the following components: cement 306-452kg, sand 622-826kg, lightweight aggregate 508-620kg, water 196-240kg, glass fiber 0.1%.
2. The concrete according to claim 1, characterized in that: The lightweight aggregate is lightweight shale ceramsite, including lightweight shale ceramsite with a particle size of 5-10 mm.
3. The concrete according to claim 1, characterized in that: The contents of the substances are as follows: 306-428 kg of cement, 787-826 kg of sand, 508-543 kg of lightweight aggregate, 201-211 kg of water, 0.1% of glass fiber, the sand ratio is 0.60-0.62, and the water-cement ratio is 0.47-0.
69.
4. The concrete according to claim 3, characterized in that: The lightweight aggregate used in the concrete is lightweight shale ceramsite with a particle size of 5-10 mm, the obtained strength grade ranges from C30 to C50, and the 28-day compressive strength is 30.03 MPa, 40.93 MPa and 50.71 MPa.