The influence cement paste composition on acting of air-entraining admixture
, in IX Sympozjum Naukowo Techniczne: Reologia w technologii betonu [IXth Symposium on Scientific and Technical Rheology on Concrete Technology], 12 June, 2007, Gliwice, Poland.
However, both SCC and ordinary concrete must need air-entraining admixture (AEA) to obtain entrained air content for enhanced durability or extended service life in freezing and thawing environment.
Laboratory Investigation of Air-Void Systems Produced by Air-Entraining Admixtures in Fresh and Hardened Mortars.
The influence of an air-entraining admixture and a superplasticizer on the formation and behaviour of air bubbles in a self-compacting concrete mix are analysed in this paper.
Moreover, to verify the influence a superplasticizer and an air-entraining admixture have on concrete porosity structure parameters, concrete samples were tested during 300 cycles of freezing and testing of porosity structure according to PN-EN 480-11.
Moreover, according to Mlodecki and Stebnicka (1996), these bubbles are slightly bigger than those formed as a result of the functioning of an air-entraining admixture, but their stability is lower (Litvan 1983).
the water to binder ratio (w/b), the dosage of an air-entraining admixture (% AEA) and the volume of inter grains porosity of an aggregate [[phi].
Among the matters for which standards have been established are terminology relating to lime and limestone, specification for air-entraining admixtures
for concrete, applying and finishing gypsum board, mortars for repairing historic masonry, a test method for the field measurement of infiltration rate using double-ring infiltometer with sealed inner ring, and conducting an inter-laboratory study to evaluate the performance of an analytical method.
When an air-entraining admixtures
is used along with a "normal" SP (without entrainment from SP as an undesirable side effect SP), investigated SCC is frost-resistant.
China's Air-Entraining Admixtures
Production and Demand
Selection of air-entraining admixtures is based primarily on the recent experience of the State highway departments in Delaware, Michigan, New Jersey, and South Dakota.
The testing program will evaluate the effect of air-entraining admixtures on the stability of air void systems prior to use in concrete and then will test the fresh concrete and hardened concrete at early ages.