Hybrid-fiber reinforced toughened high-strength self-compacting concrete and preparation method thereof
A self-compacting concrete, strengthening and toughening technology, applied in the field of concrete, to achieve the effect of obvious improvement in flexural strength and toughness, inhibiting the development of micro-cracks, and obvious effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
specific Embodiment approach 1
[0030] A hybrid fiber-reinforced toughened high-strength self-compacting concrete, in which 0.03% to 0.09% of the volume of the concrete matrix is mixed with nano-carbon fibers and 0.6% to 0.9% of the volume of the concrete matrix is copper-coated microwire steel fibers. The weight fraction is composed of: per 100 parts of concrete matrix, 35-37 parts of coarse aggregate, 31-33 parts of fine aggregate, 17-18 parts of cement, 4-6 parts of fly ash, 2-3 parts of silica fume, water reducing 0.4-0.6 parts of agent and 5-7 parts of water.
[0031] In the aforementioned hybrid fiber reinforced and toughened high-strength self-compacting concrete, the volume content of the nano-carbon fibers is 0.03% to 0.09%. When the volume content of the nano-carbon fibers exceeds the upper limit of the above range, the fibers will be unevenly dispersed and cannot Play a good role in modifying. The volume content of the copper-coated microwire steel fiber is 0.6% to 0.9%. When the volume conte...
Embodiment 1
[0041] Compressive strength test: In this embodiment, 5 groups of test pieces were made, of which 1 group without adding any fiber was used as the control group, and 4 groups of fiber concrete were used as the test group. The weight fraction of matrix concrete is as follows: per 100 parts of concrete, 36 parts of coarse aggregate, 32 parts of fine aggregate, 18 parts of cement, 5 parts of fly ash, 2.5 parts of silica fume, 0.5 parts of water reducing agent and 6 parts of water.
[0042] The compressive strength test uses a cube with a side length of 100mm, and each group makes 6 specimens. The test groups and test results are as follows:
[0043]
[0044] From the test data in the table, it can be seen that the present invention can give full play to the beneficial effect of the hybrid fiber through appropriate raw material and hybrid fiber ratio, thereby greatly improving the cubic compressive strength of concrete, which is 16.86% and 11.97% higher than ordinary concrete resp...
Embodiment 2
[0046] Splitting tensile strength: In this embodiment, 5 groups of test pieces were made, of which 1 group without adding any fiber was used as the control group, and 4 groups of fiber concrete were used as the test group.
[0047] The matrix concrete mix ratio is the same as in Example 1.
[0048] The splitting tensile strength test uses a cube with a side length of 100mm, and each group makes 6 specimens. The test groups and test results are as follows:
[0049]
[0050]
[0051] As can be seen from the test data in the table, the present invention can give full play to the beneficial effect of the hybrid fiber through appropriate raw material and hybrid fiber ratio, thereby greatly improving the splitting tensile strength of concrete, which is 29.17% higher than ordinary concrete, respectively. 50.93%, 47.39%, and 57.00%.
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| length | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More