什么是GRC

2017-03-27 00:52:00
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What Is GRC ?

Glass Reinforced Concrete (GRC) is a combination of specially developed Alkali Resistant (AR) glass fibres and cement sand mortar.

The resultant composite is a concrete like material combining the compressive properties of cement mortars with the valuable flexural and tensile strength of the glass fibres。

It is in many ways similar to concrete but its higher cement content and lower permeability make it more resistant to moisture penetration, atmospheric attack or sand erosion. The high cement and low aggregate content also result in higher moisture movement than concrete, although thermal movement is similar.

GRC was originally pioneered by the U.K. Building Research Establishment in the early 1970's. This environment-friendly composite using natural raw material is transformed into a great variety of products. Due to its flexibility to meet performance, appearance and cost parameters, GRC products are popular among designers, architects, engineers and end users.

Advantages:

  • Mouldability to produce wide range of intricate shapes and profiles.
  • Lightweight, ease and speed of handling, with reduced erection and transportation costs.
  • Reduced loadings on buildings leading to substantial reductions in structural and  foundation costs, especially useful for building renovation or restoration.
  • Ability to reproduce fine surface details.
  • Low maintenance requirements.
  • Good freeze-thaw resistance.
  • Low permeability.
  • Excellent fire properties.
  • Environment-friendly.

Properties:
Compressive strength         :  60 - 100 N/mm2
Young's modulus         :  15 - 25 KN/mm2
Impact strength         :  15 - 30 N/mm2
Ultimate tensile strength     :  10 - 17 N/mm2
Ultimate bending strength  :  28 - 42 N/mm2
Density           :  2.0 - 2.2 tonne/m3
Coefficient of thermal         : 7 - 12 x 106 per ?k
expansion (in the region 
25-45 deg C)
GRC is non-combustible, not easily ignitable and is fire resistant for up to 4 hours depending on construction.

Surface Finishes

  • Simulated Stone Finish
  • Exposed aggregate
  • Smooth Polished, Honed
  • Sealed, water repellent applied surface
  • Sandblasted
  • Applied coating such as decorative, textured painted

  • Mineralite faced



GRC是以耐碱玻璃纤维作增强材,硫铝酸盐低碱度水泥为胶结材并掺入适宜集料构成基材,通过喷射、立模浇注、挤出、流浆等生产工艺而制成的轻质、高强高韧、多功能的新型无机复合材料。利用GRC材料开发的轻质内隔墙板、保温板、外墙板、外装饰系列制品、网架屋面板、通风道、粮仓、刚性防水屋面等几十个产品已广泛地应用到建筑工程、土木工程、农牧鱼业等领域中。GRC材料及其产品的发展不仅为中国墙体材料的改革、建筑节能、建筑物的装饰装修做出了突出贡献,同时在基础理论研究、原材料品种与性能、制品开发、生产工艺水平、产品质量等方面也取得了长足的进步。由于GRC材料具有较为理想的物理力学性能以及产品易于成型与制造、产品更新换代快、市场容量大且适应性强等特点,GRC行业充满着生机与活力并正在步入朝阳行业。

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