Testing Products

Precast Concrete Components

Cement

Steel Reinforcement (including welded and mechanical connections)

Fine Aggregate (Sand)

Coarse Aggregate (Gravel)

Lightweight Aggregate

Bricks, Blocks, Tiles, Wall Panels

Concrete and Mixing Water

Concrete Admixtures

Concrete Mineral Admixtures (Supplementary Cementitious Materials)

Mortar

Soil

Waterproofing Materials and Sealing Materials

Ceramic Tiles and Stone

Plastic and Metal Pipes

Hazardous Substances in Materials

Welding Consumables (Materials)

Light Gauge Steel Joists for Construction

Water-retaining and Thickening Admixtures

Cement Products

Prestressing Steel Strand

Anchors, Grips, and Couplers for Prestressed Concrete

Corrugated Ducts for Prestressed Concrete

Aluminum-Plastic Composite Panels

Strengthening (Reinforcement) Materials

Testing Parameters and Standards

Precast Concrete Components

Parameters: Load-bearing capacity, deflection, crack width, crack resistance testing, appearance quality, component dimensions, concrete cover thickness

Standards: GB/T 22082-2024, CJJ/T 164-2011, GB/T 13476-2023, JG/T 562-2018, JGJ/T 152-2019, GB/T 16752-2017, GB/T 11836-2023, GB 50204-2015

Cement

Parameters: Setting time, soundness (expansion), mortar strength, chloride ion content, water retention rate, magnesium oxide (MgO) content, alkali content, sulfur trioxide (SO₃) content, specific surface area, density, fluidity, silicon dioxide (SiO₂), iron (III) oxide (Fe₂O₃), aluminum oxide (Al₂O₃), calcium oxide (CaO), potassium oxide (K₂O), sodium oxide (Na₂O), manganese oxide (MnO), free calcium oxide (f-CaO)

Standards: GB/T 1346-2024, GB/T 17671-2021, GB/T 3183-2017, GB/T 1345-2005, GB/T 8074-2008, GB/T 208-2014, GB/T 2419-2005, GB/T 176-2017, JTG 3420-2020

Steel Reinforcement (including welded and mechanical connections)

Parameters: Yield strength, tensile strength, percentage elongation after fracture, total percentage elongation at maximum force, reverse bending, weight deviation, residual deformation, bending performance, proof strength (non-proportional extension), elastic modulus, phosphorus (P), manganese (Mn), silicon (Si), profile/geometry, percentage reduction of area

Standards: GB/T 28900-2022, GB/T 228.1-2021, GB/T 20065-2025, GB 1499.1-2024, GB 1499.2-2024, GB/T 13014-2013, GB 13788-2024, GB 50204-2015, GB/T 20025-2016, GB/T 21839-2019, GB/T 223.59-2008, GB/T 4336-2016/XG1-2017, GB/T 223.63-2022, GB/T 223.5-2008, GB/T 14981-2009, JGJ/T 27-2014, JGJ 18-2012, JGJ 355-2015, JGJ 107-2016, JG/T 163-2013, JG/T 398-2019

Fine Aggregate (Sand)

Parameters: Particle size distribution (gradation), clay and fine dust content, clay lump content, methylene blue value (MB value) and stone powder content (for manufactured sand), crushing value (for manufactured sand), chloride ion content, apparent density, water absorption, soundness, alkali reactivity, sulfide and sulfate content, lightweight material content, organic matter content, shell content, fineness modulus, mica content, saturated surface-dry water absorption, loose bulk density, loose bulk void ratio, extraneous matter content

Standards: JGJ 52-2006, GB/T 14684-2022, JTS/T 236-2019, SL/T 352-2020, GB/T 25177-2010

Coarse Aggregate (Gravel)

Parameters: Particle size distribution (gradation), clay and fine dust content, clay lump content, crushing value, flat and elongated particle content, soundness, alkali reactivity, apparent density, bulk density, void ratio, water absorption, weak particle (soft particle) content, polished stone value (PSV), fines content (<0.075mm)

Standards: JGJ 52-2006, GB/T 14685-2022

Lightweight Aggregate

Parameters: Cylinder compressive strength, bulk density, water absorption, particle shape coefficient, sieve analysis, particle size distribution, fineness modulus

Standards: GB/T 17431.1-2010, GB/T 17431.2-2010

Bricks, Blocks, Tiles, Wall Panels

Parameters: Compressive strength, flexural strength, dry density, water absorption, impermeability, resistance to rapid heating and cooling (thermal shock), freeze-thaw resistance, breaking load, suspension load capacity, appearance quality, dimensional deviation, softening coefficient, surface density, drying shrinkage rate, moisture content, fire resistance rating, radionuclide limits, bulk density, saturation coefficient, breaking load, hardness, impact resistance, bond strength between facing paper and gypsum core, surface water absorption, fire resistance under direct flame, shear force, wet expansion rate, water tightness, non-combustibility, thermal conductivity, rain/heat cycling performance, hot water performance, soak-dry cycling performance, thermal resistance, reaction to fire performance

Standards: GB/T 21144-2023, GB/T 2542-2012, GB/T 4111-2013, GB/T 11969-2020, GB/T 24492-2009, GB/T 28635-2012, GB/T 25779-2010, GB/T 24493-2009, JC/T 641-2008, GB/T 21449-2019, GB/T 36584-2018, GB/T 9775-2025, GB/T 23451-2023, GB/T 30100-2013, JC/T 412.1-2018, GB/T 7019-2014, GB/T 7019-2024, GB/T 5464-2010, JC/T 564.1-2018, GB 6566-2010, GB/T 9978.1-2008, GB/T 9978.8-2008, GB/T 10294-2008, GB/T 10295-2008, GB/T 14402-2007, GB/T 20284-2006, GB 8624-2012

Concrete and Mixing Water

Parameters: Compressive strength, impermeability grade, slump, chloride ion content, restricted expansion rate, freeze-thaw resistance, apparent density, air content, setting time, flexural strength, splitting tensile strength, static compressive elastic modulus, effectiveness in inhibiting alkali-aggregate reaction, alkali content, mix design, mixing water (pH value, insoluble matter content, soluble matter content, sulfate content)

Standards: GB/T 50080-2016, GB/T 50081-2019, GB/T 50082-2024, JGJ 63-2006, GB/T 11896-1989, GB/T 5750.4-2023, GB/T 6920-1986, GB/T 11899-1989, GB/T 176-2017, JGJ/T 322-2013, JTS/T 236-2019, SL/T 352-2020, GB 50119-2013, GB/T 50733-2011, JTG 3420-2020, JGJ 55-2011, JGJ/T 12-2019, JG/T 266-2011, CJJ/T 177-2012

Concrete Admixtures

Parameters: Water reducing rate, pH value, density (or fineness), compressive strength ratio, setting time (difference), air content, solid content (or moisture content), chloride ion content, relative durability index, 1-hour slump/air content retention, sodium sulfate content, shrinkage ratio, alkali content, bleeding ratio, restricted expansion rate, fluidity of cement paste, total alkali content, slump retention over time

Standards: GB 8076-2008, GB/T 8077-2023, GB/T 176-2017, GB/T 1345-2005, GB/T 8074-2008, GB/T 23439-2017, JC/T 475-2004, GB/T 35159-2017, JC/T 474-2008, GB/T 50080-2016

Concrete Mineral Admixtures (Supplementary Cementitious Materials)

Parameters: Fineness, loss on ignition (LOI), water demand ratio, specific surface area, activity index, fluidity ratio, chloride ion content, moisture content, sulfur trioxide (SO₃) content, radioactivity, density, soundness, silicon dioxide (SiO₂), iron (III) oxide (Fe₂O₃), aluminum oxide (Al₂O₃), alkali content, free calcium oxide (f-CaO), calcium sulfite hemihydrate (CaSO₃ · ½H₂O) content

Standards: GB/T 1345-2005, GB/T 1596-2017, GB/T 176-2017, GB/T 17671-2021, GB 6566-2010, GB/T 208-2014, GB/T 18046-2017, GB/T 5484-2024

Mortar

Parameters: Compressive strength, consistency, water retention rate, tensile bond strength (for plastering, masonry), layer segregation, mix design, setting time, impermeability performance

Standards: JGJ/T 70-2009, DG/TJ 08-502-2020, GB/T 25181-2019, JGJ/T 220-2010, JGJ 98-2010

Soil

Parameters: Maximum dry density, optimum moisture content, compaction coefficient, particle analysis, liquid limit moisture content, plastic limit moisture content, unconfined compressive strength, coefficient of subgrade reaction, permeability coefficient, specific gravity, moisture content, direct shear, plasticity index, water content, swelling index, sieving rate, absorption/swelling rate, filtration loss, residue on 75μm sieve, plastic viscosity after dispersion, filtration loss after dispersion, durability, viscosity, dry density, wet density

Standards: GB/T 50123-2019, TB 10102-2023, DG/TJ 08-40-2010, GB/T 20973-2020, GB/T 35470-2017, JG/T 193-2006, GB/T 5005-2010, MH/T 5035-2017

Waterproofing Materials and Sealing Materials

Covers: Waterproofing membranes, waterproofing coatings, patching/leak-stopping materials, waterstop materials, and associated adhesives.

Typical Standards: GB 18242, GB 18243, GB 23441, GB/T 23457, GB/T 35467, GB 12952, GB 27789, GB/T 19250, GB/T 23446, GB/T 20474, GB 16776, GB/T 14683, GB/T 23261, JC/T 482, JC/T 483, JC/T 881, JC/T 884, JC/T 907, JC/T 984, etc.

Ceramic Tiles and Stone

Parameters: Water absorption, flexural strength (modulus of rupture), freeze-thaw resistance, radioactivity, dry compressive strength, water-saturated compressive strength, water-saturated flexural strength, bulk density, length and width, breaking strength, thickness, straightness of sides, squareness

Standards: GB/T 3810.3-2016, GB/T 3810.4-2016, GB/T 3810.2-2016, GB/T 3810.12-2016, GB 6566-2010, GB/T 9966.3-2020, GB/T 18601-2024, GB/T 19766-2016, GB/T 23452-2025, GB/T 23453-2025

Plastic and Metal Pipes

Covers: Plastic pipes (appearance/dimensions, hydrostatic/impact resistance, longitudinal reversion, thermal properties, mechanical properties, environmental stress cracking, ring stiffness, etc.) and metal pipes (tensile properties, dimensional tolerances, etc.).

Typical Plastic Pipe Standards: GB/T 19472.2, GB/T 21238, GB/T 21492, GB/T 5836.1, GB/T 5836.2, GB/T 10002.1, GB/T 10002.2, GB/T 13663.2, GB/T 13663.3, GB/T 18742.2, GB/T 19473.2, GB/T 19473.3, GB/T 28799.2, GB/T 28799.3, etc.

Typical Metal Pipe Standards: GB/T 228.1, GB/T 3091, GB/T 8163, GB/T 12771, GB/T 13295, GB/T 14976, etc.

Hazardous Substances in Materials

Parameters: Radioactivity, free formaldehyde, VOC (Volatile Organic Compounds), benzene, toluene, ethylbenzene, free TDI (toluene diisocyanate), ammonia

Standards: GB 6566-2010, GB 18580-2017, GB 18581-2020, GB 18582-2020, GB 18583-2008, GB 18584-2024, GB 18585-2023, GB 18586-2001, GB 18588-2001, GB 30982-2014, GB 38468-2019, GB 45671-2025, GB/T 17657-2013, GB/T 17657-2022, GB 50325-2020, GB/T 23990-2009, GB/T 23991-2009, GB/T 23993-2009, GB/T 30647-2014, GB/T 31106-2014, GB/T 31107-2014, GB/T 33372-2020, GB/T 41078-2021, JC/T 408-2005, JC/T 975-2005, JC/T 1066-2008, JG/T 415-2013

Welding Consumables (Materials)

Parameters: Percentage elongation after fracture, proof (non-proportional extension) strength, dimensional deviation, tensile strength (transverse tensile), tensile load, sulfur (S) and phosphorus (P) content, impact absorption energy (KV2), radiographic inspection, elongation, appearance quality, bend test, hardness, diameter and limit deviation, carbon (C), manganese (Mn), silicon (Si)

Standards: GB/T 10045-2018, GB/T 8110-2020, GB/T 10433-2024, GB/T 5117-2012, GB/T 5293-2018, GB/T 1499.3-2022, GB/T 33365-2016, GB/T 228.1-2021, GB 1499.2-2024, GB 1499.1-2024, GB 13788-2024, GB/T 2650-2022, GB/T 3323.1-2019, GB/T 37910.1-2019, Q/CR 9211-2015, GB/T 2652-2022, GB 50661-2011, GB/T 4340.1-2024, JTG/T 3650-2020, JTG/T 3651-2022, GB/T 2654-2008, GB/T 4336-2016/XG1-2017

Light Gauge Steel Joists for Construction

Parameters: Appearance quality, length, cross-sectional dimensions, thickness, lateral straightness (side), base straightness (bottom), bending inside corner radius, angle deviation, double-sided zinc coating thickness, coating thickness, coating pencil hardness, wall static load, wall impact resistance, joist static load

Standards: GB/T 11981-2024

Water-retaining and Thickening Admixtures

Parameters (Gypsum Plaster): Setting time, water retention rate, bulk density

Parameters (Building Gypsum): Initial setting time, final setting time, compressive strength, flexural strength, water absorption, swelling index, sieving rate, swelling volume

Standards: GB/T 28267-2023, GB/T 17669.4-1999, GB/T 17669.3-1999, GB/T 20973-2020

Cement Products

Covers: Fiber cement products (pipes/boards), non-combustible glass ventilation ducts, glass-fiber reinforced cement exhaust pipes, grouting couplers, anchoring plates, grout, sealing materials (joint sealants).

Typical Standards: GB/T 7019-2014, JC/T 564.1-2018, JC/T 412.1-2018, GB 8624-2012, JG/T 398-2019, JGJ 355-2015, JGJ 107-2016, GB/T 50081-2019, GB/T 17671-2021, JG/T 408-2019, GB/T 50448-2015, GB/T 8077-2023, GB 16776-2025, GB/T 14683-2017, JC/T 881-2017, JC/T 884-2016, etc.

Prestressing Steel Strand

Parameters: Tensile strength, elastic modulus, non-proportional extension, total percentage elongation at maximum force, percentage reduction of area, bending performance, torsional performance, stress relaxation performance/relaxation rate, reverse bend performance, 0.2% yield force, maximum force

Standards: GB/T 228.1-2021, GB/T 5224-2023, GB/T 21839-2019, GB/T 22315-2008, GB/T 5223-2014, GB/T 239.1-2023

Anchors, Grips, and Couplers for Prestressed Concrete

Parameters: Appearance quality, dimensions, static load anchorage performance, hardness, Brinell hardness, efficiency coefficient

Standards: TB/T 3193-2016, GB/T 14370-2015, JGJ 85-2010, GB/T 230.1-2018, GB/T 231.1-2018

Corrugated Ducts for Prestressed Concrete

Parameters: Local transverse load, ring stiffness, appearance/dimensions, radial stiffness, external load resistance (local transverse beam load), post-bending leakage resistance, leakage resistance after local transverse load, longitudinal load, flexibility, impact resistance, aging resistance, sealability, dimensional deviation, elongation at break, ash content, oxidation induction time (OIT)

Standards: JT/T 529-2016, GB/T 9647-2015, GB/T 19472.2-2017, JG/T 225-2020, JG/T 503-2016, GB/T 14152-2001, GB/T 8806-2008, GB/T 8804.3-2003, GB/T 9345.1-2008, GB/T 19466.6-2009, GB/T 19472.1-2019

Aluminum-Plastic Composite Panels

Parameters: Appearance quality, dimensional deviation, aluminum sheet thickness, coating thickness, surface pencil hardness, peel strength, reaction to fire performance

Standards: GB/T 17748-2016, GB/T 6739-2022, GB/T 1457-2022, GB 8624-2012, GB/T 8626-2007, GB/T 14402-2007, GB/T 20284-2006

Strengthening (Reinforcement) Materials

Covers: Carbon/glass fiber fabric, fiber reinforced polymer (FRP), adhesives for FRP, primers, adhesives for steel plate bonding/anchoring, crack repair adhesives, polymer cement grout, preformed plates.

Typical Parameters: Tensile strength/elastic modulus, bond strength, elongation, volatile content, aging resistance (heat/humidity), compressive/flexural/shear strength, etc.

Typical Standards: GB 50550-2010, GB 50367-2013, GB 50728-2011, GB/T 3354-2014, GB/T 9914.3-2013, JC/T 561.1-2006, GB/T 2793-1995, GB/T 2567-2021, GB/T 7124-2008, GB/T 3365-2008

Service Advantages

1.  As a national-level authoritative third-party institution, we possess top-tier qualifications and standard-setting capabilities fully covering this specialty. We provide full-chain services, from material acceptance testing and component performance evaluation to green certification.

2.  Years of specialized focus on the performance testing of building materials and components, with a professional testing team capable of providing differentiated testing services.

3.  Deep involvement in the drafting and revision of numerous national and industry standards. We have conducted extensive comparison and research on relevant domestic and international standards and have rich experience in product performance testing.

4.  Extensive service network, making us the most trusted service partner for numerous large construction enterprises and material manufacturers in the Beijing-Tianjin-Hebei region, Yangtze River Delta, Pearl River Delta, and other areas.

5.  Equipped with domestically advanced testing equipment and intelligent data analysis systems, our testing efficiency is over 30% higher than the industry average. We support real-time data upload and traceability, ensuring accurate and efficient results.

6.  We have established a full-process quality control system, implementing strict review mechanisms from sample reception and testing implementation to report issuance. Our report timeliness and customer satisfaction have consistently ranked among the top in the industry for many consecutive years.