美國水泥和混凝土外加劑需求將以每年6.4%的速度增長，并在2012年達到32億美元。
預計所有主要產(chǎn)品都將強勁增長——化學，礦物和纖維外加劑——在2007年建設活動和混凝土需求較低的基礎上。出于經(jīng)濟和環(huán)境原因，增長也將帶動混凝土工業(yè)副產(chǎn)品的利用的增長。通過使用化學和纖維添加劑提高混凝土結(jié)構的耐用性和持久性也將得到更多的關注。2007年高速公路和街道是水泥和混凝土外加劑最大的銷售市場，占到總銷售額的三分之一。據(jù)預期，聯(lián)邦運輸項目基金仍將保持強勁，所以這一市場仍將是增長最快的市場。
化學外加劑仍將是最大的產(chǎn)品部分，占市場總價值的45％。對減水劑的巨大需求，尤其是自密實和高性能混凝土的關鍵成分——高效減水劑類的產(chǎn)品，將帶來大的收益。
礦物外加劑將得到高于平均水平的收益，這也將是一個持續(xù)的長期趨勢。廢棄材料——尤其是粉煤灰——將越來越多的被用來代替混凝土中的波特蘭水泥。高爐礦渣，由于受到國內(nèi)供應制約的限制，預期其需求將有比較溫和的增長。另外，由于這些材料作為外加劑將對環(huán)境產(chǎn)生積極的作用，即可作為循環(huán)材料來減少污染和能源消耗，又可減少水泥產(chǎn)品的使用，因此預期這些產(chǎn)品的需求會有所增長。
混凝土生產(chǎn)商逐漸接受纖維類產(chǎn)品加入混凝土將帶動對纖維外加劑的強勁需求。收益將受益于不斷增長的合成粗視纖維的應用，加入高劑量合成粗視纖維可以二次加固混凝土。改良混凝土功能的新產(chǎn)品銷售量也將增加，如聚乙烯醇和纖維素纖維。
附英文：
New market report on US cement and concrete additives - Freedonia
Demand for cement and concrete additives in the US will grow 6.4 percent per year to $3.2 billion in 2012. Strong gains are expected for all major product types -- chemical, mineral and fiber additives -- as construction activity and concrete demand rebound from a low 2007 base. Advances will also be driven by rising utilization of industrial byproducts in concrete for economic and environmental reasons, as well as an increased focus on the production of durable and long-lasting concrete structures through the use of chemical and fiber additives. Highways and streets were the largest outlet for cement and concrete additives in 2007, consuming about one-third of total demand by value. This market will also grow the fastest, as it is expected that federal funding for transportation projects will remain strong through 2012. These and other trends, including company profiles and market share, are presented in Cement & Concrete Additives, a new study from The Freedonia Group, Inc., a Cleveland-based industry research firm.
Chemical additives will remain the largest product segment, comprising 45 percent of the total market in value terms. Gains will be led by strong demand for water reducers, especially high-range “superplasticizer” types, which are key components of self-consolidating and high performance concrete mixes.
Mineral additives will post above-average gains in demand, a continuation of long-term trends. Waste materials -- particularly coal fly ash -- will increasingly be used as a partial replacement for portland cement in concrete. Blast furnace slag is expected to see more moderate growth in demand, limited by domestic supply constraints. Additionally, demand will be boosted by the positive environmental profile of these additives, both as recycled materials and through their ability to reduce the pollution and energy consumption associated with cement production.
Strong gains in demand for fiber additives will be driven by the increased acceptance of these products among concrete producers. Gains will benefit from the rising use of synthetic macrofibers, which are added in high dosages to provide secondary reinforcement for concrete. New product offerings which impart improved functionality to concrete, such as polyvinyl alcohol and cellulose fibers, will also see increases in sales.
