Ultra-high admixture amount flyash grinding concrete material damming method and structure thereof

Abstract

The invention discloses an ultra-high admixture amount flyash grinding concrete material damming method and a structure thereof. The admixture amount of flyash in grinding concrete is increased, the admixture amount of flyash in upstream-face C9020 three-graded anti-seepage grinding concrete is expected to be increased to 60%, the admixture amount of flyash in in-dam C9015 three-graded grinding concrete is expected to be increased to 70% to 80%, and a high-performance additive is adopted to lower water amount and cement amount of concrete. According to the ultra-high admixture amount flyash grinding concrete material damming method and the structure thereof disclosed by the invention, hydrated high temperature increase of concrete is effectively reduced, air shrinkage and self-shrinkage ofconcrete are reduced, temperature control and anti-cracking measures are simplified, temperature control and anti-cracking cost is reduced, and a certain economic benefit is achieved. Simplified temperature control and anti-cracking measures bring possibility to seam parting and chunk parting of a dam concrete structure, construction speed is increased, conditions are created for bringing forwardtime limit of the construction, and the economic benefits are remarkable; at the same time, flyash solid waste is greatly utilized, generated energy-conserving and emission-reducing ecological and environmental benefits are obvious.

Description

technical field [0001] The invention relates to a roller compacted concrete dam material structure, which belongs to the technical field of roller compacted concrete dams. Background technique [0002] The development of roller compacted concrete dams has gone through nearly 30 years. In the past 30 years, the world's roller compacted concrete dam technology has made great progress and developed by leaps and bounds. Since the 1980s, my country started to study exploration, experimental research, and engineering practice. It has made breakthroughs in the research of RCC dam construction technology, and has rich practical experience. Many RCC specification documents have been formed within the industry. Constrained by mixing fly ash in compacted concrete, the maximum content cannot exceed 60%. None of the dams currently designed break through this regulation, which greatly limits the development of roller compacted concrete dam construction technology. RCC dam construction te...

AI Technical Summary

Problems solved by technology

Since the 1980s, my country started to study exploration, experimental research, and engineering practice. It has made breakthroughs in the research of RCC dam construction technology, and has rich practical experience. Many RCC specification documents have been formed within the industry. Constrained by mixing fly ash in compacted concrete, the maximum content cannot exceed 60%. None of the dams currently designed break through this regulation, which greatly limits the development of roller compacted concrete dam construction technology

Images