1. a reciprocal relation between two or more things. 2. a statistic representing how closely two variables co-vary; it can vary from -1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation).
Downloads from Fluoropolymers as Polymer Processing Aid (PPA) DAIKIN PPA DA-910 is a new generation Polymer Processing Aid based on fluoropolymers, to improve processing of LLDPE and HDPE for demanding film applications.
Often, additives (such as pozzolans or superplasticizers) are included in the mixture to improve the physical properties of the wet mix or the finished material. Most concrete is poured with reinforcing materials (such as rebar) embedded to provide tensile strength, yielding reinforced concrete.