A low self-shrinkage high-strength concrete prepared by using waste slurry from concrete mixing plant
A high-strength concrete and mixing plant technology, applied in the field of building materials, to achieve the effect of reducing self-shrinkage
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Embodiment 1
[0027] Calculated by weight components, including 340 parts of cement, 130 parts of lithium slag, 110 parts of waste slurry from concrete mixing plant, 696 parts of river sand, 1044 parts of gravel, 10 parts of shrinkage reducing agent, 6 parts of water reducing agent and 80 parts of water, mixed Composition, one day after the formwork is removed, the shrinkage reducer solution is applied externally.
[0028] The compressive strength of the high-strength concrete prepared from the waste slurry of the 28-day concrete mixing plant is 81.5MPa, and the autogenous shrinkage at different ages is shown in Table 1.
Embodiment 2
[0030] Calculated by weight components, including 330 parts of cement, 100 parts of lithium slag, 100 parts of waste slurry from concrete mixing plant, 714 parts of river sand, 1071 parts of gravel, 9 parts of shrinkage reducing agent, 5 parts of water reducing agent and 85 parts of water, mixed Composition, one day after the formwork is removed, the shrinkage reducer solution is applied externally.
[0031] The compressive strength of high-strength concrete prepared from the waste slurry of the 28-day concrete mixing plant is 74.7MPa, and the autogenous shrinkage at different ages is shown in Table 1.
Embodiment 3
[0033] Calculated by weight components, including 300 parts of cement, 90 parts of lithium slag, 70 parts of waste slurry from concrete mixing plant, 739 parts of river sand, 1109 parts of gravel, 8.5 parts of shrinkage reducing agent, 4 parts of water reducing agent and 92 parts of water, mixed Composition, one day after the formwork is removed, the shrinkage reducer solution is applied externally.
[0034] The compressive strength of the high-strength concrete prepared from the waste slurry of the 28-day concrete mixing plant is 62.2 MPa. The autogenous shrinkage of different ages is shown in Table 1. Table 1 shows the autogenous shrinkage values of the low autogenous high-strength concrete prepared from the waste slurry of the concrete mixing plant at different ages ( ×10 -6 )
[0035]
[0036] Table 1.
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