Thickening additives, also known as viscosity modifying additives (VMA), stabilizing additives, viscosity-enhancing admixtures (VEA), and water retaining additives (AWA), represent one of the latest innovations in the field of concrete chemical admixtures.
\nConcrete serves various purposes in construction in its fresh and hardened states. The quality of hardened concrete is often influenced by the properties of fresh concrete, which in turn, impacts its durability. It is crucial to correctly proportion the concrete and maintain homogeneity during placement and compaction to prevent bleeding, segregation, honeycombing, settlement, cracking, and air voids. These factors can significantly diminish the quality and durability of hardened concrete.
\nThrough advancements in concrete technology and the meticulous selection of its components, the properties of concrete meet the specific requirements of individual projects. This allows for faster construction, more efficient structures, increased reliability, higher ultimate strength, and accelerated attainment of strength compared to traditional methods. Modern concretes, such as self-compacting concrete, high-performance concrete, underwater concrete, and pumpable concrete, exhibit greater sensitivity to variations in material properties and fluctuations during production than conventional concrete.
\nWorkshop-produced concrete products encounter challenges in achieving uniform production due to daily changes in moisture content, aggregate granularity, and the fine grains of sand. By incorporating viscosity-modifying admixtures (VMA), the resulting concrete becomes more resilient to fluctuations in concrete ingredients and workshop conditions. Consequently, it becomes easier to control the quality of concrete using thickening materials and work with this type of concrete in a workshop environment.
\nConcrete formulations that incorporate viscosity-modifying admixture materials exhibit improved bond strength with rebars. One particular concern in deep concrete beams is the \u201ceffect of the upper rebar.\u201d This phenomenon arises in structures with significant depth, where water leakage from the concrete reduces the bond strength of horizontal rebars positioned near the top of the cross-section compared to the lower reinforcements near the base. Utilizing viscosity-modifying admixtures and appropriate formulations can mitigate the effect of the upper reinforcement by minimizing water loss and enhancing the interface between the reinforcement and concrete.<\/p>\n","protected":false},"excerpt":{"rendered":"
Viscosity Modifying Admixture (VMA\u2122) is a pre-mixed product used to enhance the viscosity of concrete and control its rheological properties. The…<\/p>\n","protected":false},"author":8,"featured_media":4684,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"product_brand":[],"product_cat":[155,153],"product_tag":[],"class_list":["post-4683","product","type-product","status-publish","has-post-thumbnail","product_cat-additives","product_cat-concrete-admixtures","entry","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/product\/4683","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/types\/product"}],"author":[{"embeddable":true,"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/comments?post=4683"}],"version-history":[{"count":4,"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/product\/4683\/revisions"}],"predecessor-version":[{"id":5631,"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/product\/4683\/revisions\/5631"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/media\/4684"}],"wp:attachment":[{"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/media?parent=4683"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/product_brand?post=4683"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/product_cat?post=4683"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/afzir.com\/en\/wp-json\/wp\/v2\/product_tag?post=4683"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}