透水混凝土技术资料

透水混凝土是如何制造的?

Pervious concrete is made from carefully controlled amounts of water and 水泥itious materials used to create a paste that forms a thick coating around aggregate particles. 与传统的混凝土, 这种混合物几乎不含沙子, creating a substantial void content – between 15 to 25 percent. 

Using sufficient paste to coat and bind the aggregate particles together creates a system of highly permeable, 连通的空隙,迅速排出. Both the low mortar content and the high porosity reduce strength compared to conventional concrete, but sufficient strength is readily achieved for many applications. 

Pervious concrete allows 3 to 8 gallons of water per minute to pass through each square foot of the material. By allowing rainwater to seep into the ground, pervious concrete can be instrumental in recharging groundwater and reducing stormwater runoff. This capability can reduce the need for retention ponds, swales, and other 雨水管理 设备. Pervious pavement integrates hardscape surfaces with 雨水管理.

使用

Hardscape

  • 少量人行道
  • 住宅区道路、小巷和车道
  • 低水位口岸
  • 停车场
  • 人行道和途径
  • 游泳池甲板
  • 路面边缘排水

地板

  • 基金会/地板温室
  • 鱼类孵化场
  • 水上游乐中心
  • 动物园

其他

  • 边坡稳定
  • 人行道上的树栅
  • 腹股沟和海堤

透水混凝土的可持续效益

Pervious concrete has many environmental benefits. See associated sustainability solutions and technical briefs for more detail.

  • 雨水管理. By allowing water to soak through and infiltrate, pervious paving reduces stormwater flow and pollutant loads. 能贡献LEED 6分吗.
  • 减少网站的干扰. 集铺路排水于一体, less site area may need to be used to manage stormwater, allowing a more compact site development foot打印. May contribute to LEED v4 Credit Sustainable Sites - Rainwater Management.
  • 当地的. Materials are usually extracted and manufactured locally. 可能有助于LEED学分m5.
  • 回收的内容. 粉煤灰, 矿渣水泥, or silica fume can substitute partially for 水泥, and recycled aggregates can replace newly mined gravel. 回收的内容 can contribute to LEED Credit M 4.
  • 很酷的. The voids reduce mass reducing the heat build-up associated with heat islands. Lighter colored 水泥s can increase reflectivity.

规格通用准则

The properties of pervious concrete vary with design and depend on the materials used and the compaction procedures. General guidelines for specifications are provided below.

  • 磁导率. Typical flow rates for water through pervious concrete are 3 to 8 gallons per square foot per minute, 但如果需要的话,可以翻倍.
  • 抗压强度. Pervious concretes can develop compressive strengths in the range of 500 to 4000 pounds per square inch (psi) – suitable for a wide range of applications.
  • 抗弯强度. Flexural strength of pervious concrete ranges between 150 and 550 psi.
  • 收缩. Drying shrinkage of pervious concrete is faster but much less than that experienced with conventional concrete. Many pervious concretes are made without control joints and are allowed to crack randomly.
  • 冻融性. Freeze-thaw resistance depends on the saturation level of the voids in the concrete at the time of freezing. 在这个领域, it appears that the rapid draining characteristics of pervious concrete prevent saturation from occurring. Where substantial moisture and freeze-thaw conditions are anticipated, pervious concrete should be placed on a 6 to 18-inches-thick layer of drainable rock base such as 1-inch crushed stone.
  • 耐磨性. Because of the rougher surface texture and open structure of pervious concrete, abrasion and raveling of aggregate particles can be a problem, particularly where snowplows are used to clear pavements. Surface raveling in new pervious concrete can occur when rocks loosely bound to the surface pop out under traffic loads.

技术简单

点击这里 查看或列印 雨水径流 - 有什么问题?

额外的信息

《冰球突破网站首页》 主成分分析 今天混凝土技术, CT043, 2004年12月,2页,PDF

Pervious concrete is ideally suited as a solution to 雨水管理 issues with added environmental benefits. The large void content designed into this specialty concrete allows water to pass through rapidly, minimizing runoff and recharging groundwater supplies. 也被称为透水混凝土, 多孔混凝土, 间断级配混凝土, 罚款具体, 以及增强孔隙率混凝土, pervious concrete can be used in a wide range of applications, 虽然它的主要用途是在人行道.

"透水混凝土 Pavement: A Win-Win System," D. 布朗,主成分分析 今天混凝土技术, CT032, 2003年8月,3页,PDF 
Use of pervious concrete pavements helps owners and the environment