{"title":"Pumice Pozzolan for Concrete Performance","description":"\u003cp\u003eMODERN PORTLAND CEMENT is fast-setting and widely useful. But it has an achilles heel: poor longivity. Almost as soon as standard concrete is placed, it begins to degrade. It’s a matter of chemistry. Studies suggest that only about 75% of the cement powder is converted to Calcium Silicate Hydrate (CSH), which is the chemical binder that makes concrete what it is. The other 25%? It is converted to a by-product compound known as Calcium Hydroxide (CH) that creates a host of problems that have a deleterious effect on the longivity and effective performance of concrete.\u003c\/p\u003e\n\u003cp\u003eThe solution? Add a pozzolan. Pozzolans are a class of supplemental cementitious materials that supercharge concrete performance. Pumice, in particular, is an excellent pozzolan. Used at a 15 to 20% replacement rate for Portland cement, the finely ground pumice pozzolan works to drastically reduce, even eliminate, by-product CH by coverting it to CSH. More CSH means more binder. That means more density in the concrete matrix, more long-term strength, less permeability (becomes highly resistant to chemical attacks and freeze-thaw-process damage), reduced heat of hydration cracking, and flatlined alkali silica reaction. All that adds up to high-performance concrete durability.\u003c\/p\u003e\n\u003cp\u003eExtensive information about how pozzolans work, and in particular, how our natural pumice pozzolan works, is available at the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/hesspozz.com\/\" target=\"_blank\"\u003eHessPozz.com website\u003c\/a\u003e. You’ll also find summaries of the quantifying research done on the performance of our pozz in concrete and mortar. A small selection of informative PDF documents are also attached below.\u003c\/p\u003e","products":[{"product_id":"densifer325-standard-pumice-pozzolan","title":"Densifer325™ Pumice Pozzolan","description":"\u003cp\u003e\u003cstrong\u003eDensifer325 \u003c\/strong\u003e(Standard Pozz)\u003c\/p\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003ePozzolans are a class of supplemental cementitious materials (SCMs) that supercharge concrete performance. Pumice, in particular, is an excellent pozzolan. Used at a 15 to 20% replacement rate for Portland cement, the finely ground pumice pozzolan works to drastically reduce, even eliminate, by-product CH by coverting it to CSH. More CSH means more binder. That means more density in the concrete matrix, more long-term strength, less permeability (becomes highly resistant to chemical attacks and freeze-thaw-process damage), reduced heat of hydration cracking, and flatlined alkali silica reaction. All that adds up to high-performance concrete durability.\u003c\/p\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical Applications:\u003c\/strong\u003e \u003c\/span\u003eA highly-effective natural pozzolan for precast concrete products, formed-and-cast concrete construction like walls, piers and foundations as well as shotcretes, cementitious grouts, plasters, mortars. Densifier325™ is a must in regions with reactive aggregates that cause ASR and in locations with high-sulfate soils or in applications subject to sulfate and\/or chloride attacks. Also effective in high abrasive and freeze-thaw environments. Use with lightweight pumice aggregate concrete to prevent ASR.\u003c\/p\u003e","brand":"Hess Pumice Products","offers":[{"title":"1 lb. (resealable bag)","offer_id":60791291924,"sku":"","price":6.9,"currency_code":"USD","in_stock":true},{"title":"2.5 lbs. (resealable bag)","offer_id":60767207444,"sku":"","price":11.0,"currency_code":"USD","in_stock":true},{"title":"5 lbs. (2 resealable bags)","offer_id":60771893268,"sku":"","price":14.9,"currency_code":"USD","in_stock":true},{"title":"20 lbs. (box)","offer_id":47654153812,"sku":"","price":21.0,"currency_code":"USD","in_stock":true},{"title":"45 lbs. (full-sized production bag)","offer_id":21371014512720,"sku":"","price":26.0,"currency_code":"USD","in_stock":true},{"title":"135+ lbs. (contact us)","offer_id":47654154132,"sku":"","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1180\/4954\/files\/Grade_StandardPozz.jpg?v=1772696499"},{"product_id":"ultrapozz-ultrafine-pumice-pozzolan","title":"UltraPozz: Ultrafine Pumice Pozzolan","description":"\u003cp\u003e\u003cstrong\u003eUltraPozz \u003c\/strong\u003e(Ultrafine 3-Micron Pozzolan)\u003c\/p\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003ePozzolans are a class of supplemental cementitious materials (SCMs) that supercharge concrete performance. Pumice, in particular, is an excellent pozzolan. Used at a 15 to 20% replacement rate for Portland cement, the finely ground pumice pozzolan works to drastically reduce, even eliminate, by-product CH by coverting it to CSH. More CSH means more binder. That means more density in the concrete matrix, more long-term strength, less permeability (becomes highly resistant to chemical attacks and freeze-thaw-process damage), reduced heat of hydration cracking, and flatlined alkali silica reaction. All that adds up to high-performance concrete durability.\u003c\/p\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypical Applications:\u003c\/strong\u003e UltraPozz is a\u003c\/span\u003e bright, highly-effective natural pozzolan used in high-end precast concrete products like glass fiber reinforced concrete (GFRC) panels and other architectural accent pieces. Also used in ultrafine cementitious grouts.\u003c\/p\u003e","brand":"Hess Pumice Products","offers":[{"title":"2 lbs. (resealable bag)","offer_id":61937516564,"sku":"","price":11.0,"currency_code":"USD","in_stock":true},{"title":"4 lbs. (2 resealable bags)","offer_id":61976936468,"sku":"","price":18.0,"currency_code":"USD","in_stock":true},{"title":"20 lbs. (box)","offer_id":47654692244,"sku":"","price":21.0,"currency_code":"USD","in_stock":true},{"title":"50 lbs. (full-sized production bag)","offer_id":21371118387280,"sku":"","price":36.0,"currency_code":"USD","in_stock":true},{"title":"150+ lbs. (contact us)","offer_id":47654692820,"sku":"","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1180\/4954\/files\/Grade_Ultrapozz.jpg?v=1772696379"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1180\/4954\/collections\/crumbling-overpass-support.jpg?v=1771850509","url":"https:\/\/pumicestore.com\/collections\/pumice-pozzolan.oembed","provider":"The Pumice Store","version":"1.0","type":"link"}