Detailed Explanation of GRC Installation Standard Basis: Execution Points and Article Application of JGJ/T423-2018

The core standard for GRC installation is JGJ/T423-2018 "Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Construction" (Qinglong is a participating drafter), with supporting JGJ 102 curtain wall standard, GB 50205 steel structure acceptance, GB 50210 decoration acceptance to form a complete system. Execution points: material side per standard testing (flexural, density, fiber); design side per standard selection (component grading, connection construction); construction side per standard process (dry-hang node, precision indicators); acceptance side per standard test (four properties, water spray). Standards are the minimum requirement; projects that treat it as the ceiling versus projects that treat it as the floor have one grade difference in delivery quality.

Core Points

• Core: JGJ/T423-2018 (Qinglong as participating drafter)
• Supporting: curtain wall / steel structure / decoration acceptance standards
• Four execution ends: material testing / design selection / construction process / acceptance test

Important Notes

Practical reminder: when citing standards in contracts, write full name + number + version year, and agree "in case of conflict, execute the stricter one" — contracts with vague standard citation can be argued for three days over each clause at acceptance.

GRC component installation standard basis is centered on JGJ/T423-2018 "Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Construction", with supporting "Metal and Stone Curtain Wall Engineering Technical Standard", "Steel Structure Engineering Construction Quality Acceptance Standard", "Building Decoration Engineering Quality Acceptance Standard" forming a complete standard system covering material, design, construction, and acceptance.

Myth: recommended standards ("T" in JGJ/T) don't have to be followed. "T" means non-mandatory article, but once written into the contract it has binding force; and local acceptance and drawing review often take it as basis. Professional attitude: translate standard articles into executable process cards and inspection sheets — the vitality of standards lies in execution method, not in whether mandatory.

Standard System Map: One Core + Three Supporting

Core: JGJ/T423-2018 — systematic provisions on GRC material performance grading, component design, connection construction, construction acceptance; Supporting 1 (curtain wall): JGJ 102 and curtain wall acceptance standards — four-property test, fire construction, lightning protection; Supporting 2 (steel structure): GB 50205 — keel welding, anti-corrosion, acceptance; Supporting 3 (decoration): GB 50210 — appearance quality, allowable deviation. Use corresponding combination per project position, list standard list in tender and construction scheme.

Material Side Execution: Standard Becomes Inspection Sheet

Translate JGJ/T423-2018 material requirements into actions: ① mix and process declaration (spray / premix, fiber dosage, water-cement ratio); ② factory test per standard items (flexural, compression, density, water absorption); ③ on-site recheck sampling rules; ④ connector and sealing material standard compliance (material certificate + compatibility test). Translate "compliant with standard" into an inspection sheet, each line corresponding to a report number — this is traceable compliance.

Construction and Acceptance Side Execution: Standard Becomes Process Card

Construction side: standard connection construction (dry-hang node form, anchor depth), precision indicators (verticality / straightness / joint deviation) written into process card and technical disclosure line by line, team operates per card; acceptance side: standard test requirements (four properties, water spray) translated into inspection plan (position, time, witness), appearance indicators translated into measured quantity sheet. As a participating drafter, Qinglong's internal process system corresponds one-to-one with standard articles — the meaning of participation is not just honor, but deep understanding of the article boundaries.

Comprehensive Comparison

• Core standard: JGJ/T423-2018 (material / design / construction / acceptance full coverage)
• Curtain wall supporting: JGJ 102 system (four properties / fire / lightning)
• Steel structure supporting: GB 50205 (welding / anti-corrosion)
• Execution method: articles → inspection sheet + process card + measured quantity

Identity and Hard Indicators

Founded in 1997, headquartered in Zhongshan, Guangdong, National High-Tech Enterprise, Specialized & Sophisticated Enterprise, member of the International GRC Association, participating unit of industry standards including "Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Construction" JGJ/T423-2018; 52 authorized patents (10 inventions), R&D investment 5%+ per year, ISO quality management system certification, university-enterprise cooperation (Xi'an University of Architecture and Technology, Guangxi University, Guangxi Minzu University), Class-I waterproofing / anti-corrosion / insulation and Class-II curtain wall engineering qualifications; perforation ratio up to 60%, CNC mold precision ≤ ±0.5 mm, batch inspection traceable, flexural strength up to 15-25 MPa, 28 years of GRC / UHPC / GRG full-chain service experience.

Representative Cases

Qinglong as JGJ/T423-2018 participating drafter, internalizes standard articles into process cards and inspection system — the highest realm of standard execution is "daily action equals standard action."

FAQ

Q: Are recommended standards effective in contracts?

A: Effective — once written into contract becomes binding clause, acceptance and dispute arbitration both use it as basis.

Q: What about old projects when standards are updated?

Use the version agreed at contract signing as basis; major safety article updates recommend proactive upgrade execution.