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GFRC (Glass Fiber Reinforced Concrete), also known as GRC, is referred to as glass fiber reinforced cement products in Chinese. It is the flagship product of Xindaxin Company, a composite material made with high-strength cement and silica sand as base materials and alkali-resistant glass fiber as the reinforcing material, while also including various additives to enhance performance, as well as pigments, etc.

As a supporter and staunch advocate of international industry standards, we stand at the forefront of the surging tide of the times, adhering to the path of building a strong enterprise with high-quality products. The materials we use are all from reputable sources, have passed inspections by authoritative departments, and meet international standards. We reject shoddy quality and vicious competition involving the substitution of inferior goods for quality ones. Our materials comply with the requirements of both the EU standard BSEN and the US standard ASTM. True gold fears no fire; we are willing to adopt an open attitude and accept supervision and inspection from our customers.

According to the regulations of the international GRCA and the US PCI, all raw materials must be determined as qualified before project initiation and then production can proceed. The batching before production is an important prelude to the production process, and the mix design depends on strength requirements, surface texture, density, fire resistance rating, and other material properties. Records of the actual mix proportions used should be kept to ensure the correlation between the performance of the cured products and the specified requirements.

The mix ratio must be left to the producer to determine, so as to achieve appropriate workability, performance characteristics, and surface finish under specified environmental conditions and with available materials. It shall be adjusted based on the physical properties outlined in the design parameters, and the mix ratio must be established and all performance tests confirmed before large-scale production.

Xindaxin Company has introduced mixing equipment and spraying devices from the UK's POWER-SPRAYS Company. GFRC production primarily employs the spray-up process, which is accomplished using a mixer, mortar delivery pump, and spray gun. The operation involves using a spray gun to cut continuous untwisted roving glass fibers into short fibers (typically 28-32mm in length), then spraying the glass fibers and cement mortar together onto a mold, followed by manual lamination and compaction to complete the remanufacturing


The thickness control and uniformity of product spraying are crucial to product quality and cost control, while the compaction process ensures the product's compactness. The company has product technicians with over a decade of work experience, providing strong assurance for product quality. After production, the products undergo more than 12 hours of curing. Since the product formulation includes emulsion components, a thin layer forms after the mixture solidifies, retaining moisture to allow the cement to continue hardening, achieving the performance of dry curing. After the products solidify and are removed from the molds, they are transferred to the repair area. Repair requires precise formulations and meticulous operations by experienced technicians to ensure a flawless surface and a complete finish. Subsequently, a waterproof treatment is applied to the finished surface, enabling the product to possess self-cleaning capabilities.


Xindaxin Company adopts GRCA standards, EU standard BSEN, and US standard PCI as its corporate execution standards.  

Serial number

Test items

American Standard

EU standards

1

Material testing and product tolerance

PCI-MNL-130 Standard

2

Material Testing and Product Tolerance

PCI-MNL-128 Standard

GRCA-GFRC Practical Design Guide

3

Mortar slump test

PCI-MNL-130 Appendix F

BSEN 1170-1:1998

4

Rinsing method for testing fiber content

ASTM C1228-96/1229-94

BSEN1170-3:1998

5

Jet fiber content test

PCI-MNL-130 Appendix F

BSEN1170-3:1998

6

Bending resistance test

ASTM C1228-96
ASTM C947-03

BSEN1170-4:1998
BSEN1170-5:1998

7

Density and water absorption rate test

ASTM C948-81

BSEN 1170-6:1998

8

Embedded part tension test

ASTM C1230-96

9

Moisture content refers to the test for dimensional change value.

BSEN1170-7:1998


The GFRC physical properties of Xindaxin Company:

Performance

Abbreviation

Unit

Range value

Compressive strength

fc

 N/mm2

40-80

Tensile strength

fct

 N/mm2

5-10

Proportional limit

LOP

N/mm2

6-18

Modulus of rupture

MOR

N/mm2

18-30

Ultimate strain

εu

0.5-8

Impact resistance

-

N mm /mm2

10-30

Elastic modulus

E

kN/mm2

 10-25

Density

γ

Kg/dm3

1.6-2.2

Coefficient of thermal expansion

αT

/℃

(1.0-1.5)×10-5

Thermal conductivity

λ

W/mK

0.8-1.2

Fire protection rating (according to DIN4102)

-

-

A1 Or A2

Shrinkage value

εcs

mm/m

1.0-2.0

Txpansion value

κ

mm/m

0.5-1.0

Water absorption rate

-

%

3-15

Water vapor diffusion

μ

-

50-200



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