<https://www.hpdconsult.com/what-is-concrete-retarder/#richSnippet>
<http://schema.org/description>
"Concrete retarder is a type of admixture or additive used in concrete mixtures to slow down the curing process, providing more time for placement, finishing, Building &amp; Construction, Civil Engineering &amp; Structural Designs"
<https://www.hpdconsult.com/what-is-concrete-retarder/>