That variability is especially owed to the effects on air voids of aggregate, cement and supplementary cementitious materials; air-entraining agent dosage; batch contaminants; mixing dynamics; temperatures during batch-to-placing window; and, mix slump changes.
After the 2014 ConExpo-Con/Agg preview of a polymeric, microsphere-based agent manufactured at the batch plant and aimed at replacing air-entraining agents, BASF Construction Chemicals' Admixture Systems commenced market awareness and acceptance activities.
Moreover, according to the researchers (Kurdowski 2003), these bubbles are slightly bigger than those trapped under the influence of an air-entraining agent
, but their stability is lower.
One paper emphasizes the effects of void parameters on concrete FT resistance, and one paper introduces a new method for determining the air-entraining agent
demand of a concrete mixture.
The amount of the air-entraining agent
admixture required to obtain the target air percentage in a concrete mix increases with the increase in the fly ash content in the mix, say Chaitanya Paleti, graduate student, and Jan Olek, professor, School of Civil Engineering, Purdue University, and Tommy E.
Target new opportunities with high potential- Indonesia, Thailand, Brazil, and Srilanka are emerging as big construction market- Air-entraining Agents
and waterproofings admixtures are growing at higher rates
Order a copy of Concrete Admixtures Market by Type (Superplasticizers, Normal Plasticizers, Accelerating Agents, Air-Entraining Agents
, Retarding Agents, Waterproofing Agents, & Others), & by Application (Residential, Non-Residential, & Infrastructure) - Global Forecasts to 2020 research report at http://www.
In recent years, synthetic air-entraining agents
have caused problems in a number of paving projects, including loss of strength.
The report "Concrete Admixtures Market by Type (Superplasticizers, Normal Plasticizers, Accelerating Agents, Air-Entraining Agents
, Retarding Agents, Waterproofing Agents, & Others), & by Application (Residential, Non-Residential, & Infrastructure) - Global Forecasts to 2020", published by MarketsandMarkets, The market is estimated to be USD 11.
Freezing of air-entrained cement-based materials and specific actions of air-entraining agents
, Cement and Concrete Composites 25(7): 759-765.
As of year 2012 Asia-Pacific leads concrete admixtures consumption volume by xxx% followed by Middle East and Africa region (about xxx%), Europe (about xxx%), and North-South American region (together about xxx%) of which normal plasticizers leads consumption by xxx% followed by super-plasticizers (xxx%), waterproofing admixtures (around xxx%), accelerating agents (about xxx%), retarding agents (xxx%), and air-entraining agents
TABLE 67 AIR-ENTRAINING AGENTS CONSUMPTION MARKET VOLUME, BY GEOGRAPHY, 2010 - 2017 (KILO TONS)