chemical admixtures Archives

Negative Effects of Using Concrete Admixtures

Concrete practitioners use admixtures for multiple of reasons such as increasing the workability of concrete, adjusting the setting time, accelerating the rate of strength gain, etc. However, in some case, admixtures may cause adverse effects

Hydroxycarboxylic acids and Hydroxylated polymers Water Reducers

TeamCivil Concrete, Materials

Hydroxycarboxylic acids and hydroxylated polymers are chemical families that have been used in formulations for water-reducing and set-modifying concrete admixtures. The chemistry of an ingredient does not, by itself, determine the ASTM performance type of

Lignosulfonates as Water Reducers for Concrete

TeamCivil Concrete, Materials

Lignosulfonates are commonly used in conventional water-reducing admixtures. They are not automatically equivalent to superplasticizers or every high-range water reducer. Performance is established by the product and the applicable ASTM C494/C494M type. Classification matters Class

Types of Chemical Admixtures

TeamCivil Concrete, Materials

Chemical admixtures are ingredients added to concrete before or during mixing to change fresh or hardened properties. They can reduce water demand, control setting, entrain air, improve flow, or provide another specified function. Supplementary cementitious

Types of Concrete Admixtures

TeamCivil Concrete, Properties

Before stating the types of concrete admixtures, let us start first by the definition of “Admixtures”. According to ACI Committee 116, an admixture is ‘a material other than water, aggregates, hydraulic cement, and fiber reinforcement, used