Fast hardening early strength concrete for overall width repair of cement concrete pavement
A cement concrete, full-thickness technology, applied in the field of building materials, can solve the problems of unsuitable road maintenance management unit maintenance, existence of flatness, load transfer between plates, poor economy, etc., to facilitate large-scale popularization and application, reduce maintenance and repair. Cost, repair speed effect
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[0012] Example 1
[0013] Weigh 525 kg of early-strength Portland cement, 640 kg of medium sand, 1137 kg of crushed stone, 146 kg of water, and 5.12 kg of KDSP-1 admixture. Mix the above-mentioned raw materials evenly to obtain a full-thick cement concrete road surface. Fast-hardening and early-strength concrete for repair.
[0014] Technical indicators of fast-hardening and early-strength concrete fast-repairing materials for full-thickness repair of cement concrete pavements: 24-hour flexural strength 5.06MPa, 24-hour compressive strength 41.5MPa.
Example Embodiment
[0015] Example 2
[0016] Weigh 525 kg of early-strength Portland cement, 640 kg of medium sand, 1137 kg of crushed stone, 146 kg of water, and 4.65 kg of KDSP-1 admixture. Mix the above-mentioned raw materials evenly to obtain the full thickness of the cement concrete road Fast-hardening and early-strength concrete for type repair.
[0017] Technical indicators of fast-hardening and early-strength concrete quick-repair materials for full-thickness repair of cement concrete pavement: 24-hour flexural strength 4.99MPa, 24-hour compressive strength 32.7MPa.
Example Embodiment
[0018] Example 3
[0019] In order to fully illustrate the technical effects of the present invention, a comparative test using special materials and similar proportions is used to compare and analyze the benefits of the technical invention results.
[0020] Weigh 554 kg of fast-hardening sulphoaluminate cement, 554 kg of medium sand, 1184 kg of crushed stone, 227 kg of water, and 54 kg of white latex, and mix the above components evenly to obtain a full-thick cement concrete pavement repair fast Hard early-strength concrete.
[0021] Technical indicators of fast-hardening and early-strength concrete fast-repairing materials for full-thickness repair of cement concrete pavements: 24-hour flexural strength 5.21MPa, 24-hour compressive strength 21.53MPa.
[0022] Except for Example 3, other concretes made of fast hardening sulfoaluminate cement or other admixtures have a 24-hour compressive strength of no more than 30MPa, and the effect is much lower than that of Example 1 and implement...
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