Construction Quality Variance in VAE Research and Development Projects
The experimental results show that the addition of HP cellulose has an obvious retarding effect on the mortar mixture, and the setting time of mortar is prolonged with the increase of HP cellulose content. Under the same hp cellulose content, the setting time of mortar formed under water is longer than that formed in air. When measured in water, the setting time of mortar mixed with HP cellulose is 6~18 h delayed in initial setting and 6~22 h delayed in final setting compared with the blank sample. Therefore, HP cellulose should be combined with early strength agent.
Furthermore, MHEC acts as a water retention agent, preventing the premature evaporation of water from the cement mixture. This is especially important in hot and dry climates, where rapid water loss can lead to shrinkage and cracking of the cement. By retaining water, MHEC ensures that the cement cures properly, resulting in a stronger and more durable final product.