Flyash excitant

Abstract

The flyash excitant has two different compositions. That for no-steel bar concrete consists of mirabilite 10-30 wt%, calcium chloride 10-30 wt%, sodium chloride 10-20 wt%, efficient water reducing agent 10-25 wt%, calcium lignosulfonate 1.5-7.0 wt% and ardealite 5-15 wt% other than carrier material. That for reinforced concrete consists of mirabilite 10-30 wt%, calcium chloride 10-15 wt%, sodium chloride 10-20 wt%, calcium nitrite 20-30 wt% efficient water reducing agent 6-10 wt%, calcium lignosulfonate 2-5 wt% and ardealite 5-15 wt% other than carrier material. The flyash excitant can excite the latent activity of flyash effectively so as to increase the added amount of flyash in concrete and lower the cost of concrete product.

Description

technical field [0001] The invention belongs to a fly ash activator specially developed for improving the filling performance of fly ash in concrete and mortar. Background technique [0002] At present, there are many measures to improve the activity of fly ash at home and abroad, which can be summarized as mechanical activation, chemical activation, physical activation and mechanochemical activation. The trend of domestic comprehensive utilization of fly ash is to pay attention to the direct application of the discharged fly ash, and strive for high dosage, so as to reduce the processing cost and obtain higher economic and social benefits. Therefore, the development and research of fly ash activator , has always been an important subject of comprehensive utilization of fly ash. Existing fly ash activators mostly use alkali (calcium oxide, sodium hydroxide, etc.), sulfates (gypsum, Glauber’s salt, etc.), chlorides (sodium chloride, calcium chloride, etc.), sodium carbonate,...

AI Technical Summary

Problems solved by technology

In addition to water-reducing agents (plasticizers), when the above-mentioned inorganic substances such as alkali and salt are mixed, the amount of addition is often relatively high, which not only increases the cost, but also causes problems when the amount of addition is large or used improperly. Some disadvantages, such as whitening and frosting, corrosion and damage to the durability of concrete due to alkali-aggregate reaction, etc.