{"id":2077,"date":"2025-06-09T01:38:25","date_gmt":"2025-06-09T01:38:25","guid":{"rendered":"https:\/\/tidepoch.com\/?p=2077"},"modified":"2025-06-09T07:43:38","modified_gmt":"2025-06-09T07:43:38","slug":"water-reducer-agent","status":"publish","type":"post","link":"https:\/\/tidepoch.com\/?p=2077","title":{"rendered":"Water Reducer\u00a0Agent"},"content":{"rendered":"\n<p><strong>Water Reducer&nbsp;Agent<\/strong><\/p>\n\n\n\n<p>Water reducers&nbsp;are special chemical products added to a&nbsp;concrete&nbsp;mixture before it is poured. They are from the same family of products as&nbsp;retarders. The first class of water reducers was the&nbsp;lignosulfonates&nbsp;which has been used since the 1930s. These inexpensive products were derived from wood and&nbsp;paper industry, but are now advantageously replaced by other synthetic&nbsp;sulfonate&nbsp;and&nbsp;polycarboxylate, also known as&nbsp;superplasticizers.<\/p>\n\n\n\n<p>Water reducers offer several advantages in their use, listed below:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>reduces the water content by 5-10%.<\/li>\n\n\n\n<li>decreases the concrete\u00a0porosity.<\/li>\n\n\n\n<li>increases the\u00a0concrete strength\u00a0by up to 25% (as less water is required for the concrete mixture to remain workable).<\/li>\n\n\n\n<li>increases the workability (assuming the amount of free water remains constant).<\/li>\n\n\n\n<li>reduces the water\u00a0permeability\u00a0(due to less water being used).<\/li>\n\n\n\n<li>reduces the\u00a0diffusivity\u00a0of aggressive agents in the concrete and so improves the durability of concrete.<\/li>\n\n\n\n<li>gives a better finish to surfaces.<\/li>\n<\/ul>\n\n\n\n<p>Superplasticizers&nbsp;(SPs), also known as&nbsp;high range water reducers, are&nbsp;additives&nbsp;used for making high strength&nbsp;concrete&nbsp;or to place&nbsp;self-compacting concrete.&nbsp;Plasticizers&nbsp;are chemical compounds enabling the production of&nbsp;concrete&nbsp;with approximately 15% less&nbsp;water content. Superplasticizers allow reduction in water content by 30% or more. These additives are employed at the level of a few weight percent. Plasticizers and superplasticizers also retard the setting and hardening of concrete.<\/p>\n\n\n\n<p>According to their&nbsp;dispersing&nbsp;functionality and action mode, one distinguishes two classes of superplasticizers:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Ionic interactions\u00a0(electrostatic repulsion):\u00a0lignosulfonates\u00a0(first generation of ancient water reducers),\u00a0sulfonated\u00a0synthetic\u00a0polymers\u00a0(naphthalene, or\u00a0melamine,\u00a0formaldehyde\u00a0condensates) (second generation);<\/li>\n\n\n\n<li>Steric effects:\u00a0Polycarboxylates-ether\u00a0(PCE) synthetic polymers bearing lateral chains (third generation).<\/li>\n<\/ol>\n\n\n\n<p>Superplasticizers are used when well-dispersed&nbsp;cement&nbsp;particle suspensions are required to improve the flow characteristics (rheology) of concrete. Their addition allows to decrease the&nbsp;water-to-cement ratio&nbsp;of concrete or&nbsp;mortar&nbsp;without negatively affecting the&nbsp;workability&nbsp;of the mixture. It enables the production of&nbsp;self-consolidating concrete&nbsp;and high-performance concrete. The water\u2013cement ratio is the main factor determining the&nbsp;concrete strength&nbsp;and its durability. Superplasticizers greatly improve the fluidity and the rheology of fresh concrete. The concrete strength increases when the water-to-cement ratio decreases because avoiding to add water in excess only for maintaining a better workability of fresh concrete results in a lower&nbsp;porosity&nbsp;of the hardened concrete, and so to a better resistance to compression.<\/p>\n\n\n\n<p>The addition of SP in the&nbsp;truck&nbsp;during transit is a fairly modern development within the industry. Admixtures added in transit through automated&nbsp;slump&nbsp;management system,&nbsp;allow to maintain fresh concrete slump until discharge without reducing concrete quality.<\/p>\n\n\n\n<p>Working mechanism<\/p>\n\n\n\n<p>Phosphonic acid-terminated&nbsp;polyethers&nbsp;are effective superplasticizers.<\/p>\n\n\n\n<p>Traditional plasticizers are&nbsp;lignosulfonates&nbsp;as their&nbsp;sodium salts.&nbsp;Superplasticizers are synthetic&nbsp;polymers. Compounds used as superplasticizers include sulfonated naphthalene formaldehyde condensate, sulfonated melamine formaldehyde condensate, acetone formaldehyde condensate and &nbsp;polycarboxylates&nbsp;ethers.&nbsp;Cross-linked&nbsp;melamine- or&nbsp;naphthalene-sulfonates, referred to as PMS (polymelamine sulfonate) and PNS (polynaphthalene sulfonate), respectively, are illustrative. They are prepared by&nbsp;cross-linking&nbsp;of the sulfonated&nbsp;monomers&nbsp;using formaldehyde or by sulfonating the corresponding crosslinked polymer.<\/p>\n\n\n\n<p>Polycarboxylate&nbsp;superplasticizer stabilizing a&nbsp;colloidal suspension&nbsp;through steric interactions thanks to its lateral chains. Note: the PCE molecules are adsorbed onto positively-charged cement particles (tricalcium aluminate&nbsp;(C3A) mineral phase).<\/p>\n\n\n\n<p>The polymers used as plasticizers exhibit&nbsp;surfactant&nbsp;properties. They are often&nbsp;ionomers&nbsp;bearing negatively charged groups (sulfonates,&nbsp;carboxylates, or&nbsp;phosphonates&#8230;). They function as&nbsp;dispersants&nbsp;to minimize particles segregation in fresh concrete (separation of the cement slurry and water from the coarse and fine aggregates such as&nbsp;gravels&nbsp;and&nbsp;sand&nbsp;respectively). The negatively charged polymer backbone&nbsp;adsorbs&nbsp;onto the positively charged&nbsp;colloidal&nbsp;particles of unreacted cement, especially onto the&nbsp;tricalcium aluminate&nbsp;(C3A) mineral phase of cement.<\/p>\n\n\n\n<p>Melaminesulfonate (PMS) and naphthalenesulfonate (PNS) mainly act by&nbsp;electrostatic interactions&nbsp;with cement particles favoring their electrostatic repulsion while polycarboxylate-ether (PCE) superplasticizers&nbsp;sorb&nbsp;and coat large agglomerates of cement particles, and thanks to their lateral chains, sterically favor the dispersion of large cement agglomerates into smaller ones.<\/p>\n\n\n\n<p>However, as their working mechanisms are not fully understood, cement-superplasticizer incompatibilities can be observed in certain cases.<\/p>\n\n\n\n<p>Common superplasticizer types<\/p>\n\n\n\n<p>Idealized structure of&nbsp;naphthalenesulfonate\/formaldehyde&nbsp;polymer used as a superplasticizer.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sulfonated Naphthalene Formaldehyde<\/li>\n\n\n\n<li>Polycarboxylate Superplasticizer (PCE), also called water reducer, is an additive used in concrete and mortars. It improves the flowability without increasing the water content. This allows for high-strength, high-performance concrete and mortar with lower water-to-cement ratios. SCE accelerate the early strengthening of concrete or mortar.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"767\" src=\"https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_202505230931331-1024x767.jpg\" alt=\"\" class=\"wp-image-2079\" style=\"width:1222px\" srcset=\"https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_202505230931331-1024x767.jpg 1024w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_202505230931331-300x225.jpg 300w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_202505230931331-768x575.jpg 768w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_202505230931331-1536x1151.jpg 1536w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_202505230931331-2048x1534.jpg 2048w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_202505230931331-1200x899.jpg 1200w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_202505230931331-80x60.jpg 80w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"681\" src=\"https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_20250522144455-1-1024x681.png\" alt=\"\" class=\"wp-image-2080\" style=\"width:1227px\" srcset=\"https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_20250522144455-1-1024x681.png 1024w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_20250522144455-1-300x199.png 300w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_20250522144455-1-768x511.png 768w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_20250522144455-1-1536x1021.png 1536w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_20250522144455-1-2048x1362.png 2048w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_20250522144455-1-1200x798.png 1200w, https:\/\/tidepoch.com\/wp-content\/uploads\/2025\/06\/\u5fae\u4fe1\u56fe\u7247_20250522144455-1-80x53.png 80w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Water Reducer&nbsp;Agent Water reducers&nbsp;are special chemical products added to a&nbsp;concrete&nbsp;mixture before it is poured. They are from the same family<\/p>\n","protected":false},"author":1,"featured_media":2078,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[192,193],"class_list":["post-2077","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-water-reducer","tag-water-reducer-agent"],"acf":[],"_links":{"self":[{"href":"https:\/\/tidepoch.com\/index.php?rest_route=\/wp\/v2\/posts\/2077","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tidepoch.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tidepoch.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tidepoch.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tidepoch.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2077"}],"version-history":[{"count":2,"href":"https:\/\/tidepoch.com\/index.php?rest_route=\/wp\/v2\/posts\/2077\/revisions"}],"predecessor-version":[{"id":2099,"href":"https:\/\/tidepoch.com\/index.php?rest_route=\/wp\/v2\/posts\/2077\/revisions\/2099"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tidepoch.com\/index.php?rest_route=\/wp\/v2\/media\/2078"}],"wp:attachment":[{"href":"https:\/\/tidepoch.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2077"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tidepoch.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2077"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tidepoch.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2077"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}