Twining Concrete Insight provides a comprehensive scope of tests on concrete, materials used for concrete, mortars, grouts, portland cement products, concrete roof fill materials, etc. Our certified laboratories can assist you in demonstrating compliance with ASTM standards, ACI building codes, Greenbook, Caltrans specifications, FAA specifications, USACE specifications, and/or requirements of other local or federal agencies.

Concrete

• Laboratory trial batch of concrete (ASTM C192)
• Concrete setting time (ASTM C403)
• Slump flow of self-consolidating concrete (ASTM C1611)
• Passing ability of self-consolidating concrete by J-ring (ASTM C1621)
• Static segregation of self-consolidating concrete (ASTM C1610)
• Bleeding of concrete (ASTM C232)
• Compressive strength (ASTM C39)
• Flexural strength (ASTM C78)
• Splitting tensile strength (ASTM C496)
• Static modulus of elasticity (ASTM C469)
• Drying shrinkage (ASTM C157, AASHTO T160)
• Restrained expansion (ASTM C878)
• Coefficient of thermal expansion (AASHTO T336, CRD 39)
• Flexural toughness of fiber-reinforced concrete (ASTM C1609, EN 14651)
• Tensile performance of fiber-reinforced concrete using double-punch loading (Draft ASTM)
• Cracking resistance (ASTM C1581)
• Creep (ASTM C512)
• Water-soluble chloride (ASTM C1218)
• Acid-soluble chloride (ASTM C1152)
• Rapid chloride permeability (ASTM C1202)
• Chloride diffusion coefficient (ASTM C1556, NT Build 492)
• Concrete formation factor (AASHTO 358)
• Density, absorption, and voids in hardened concrete (ASTM C642)
• Bulk electrical resistivity of concrete (ASTM C1876)
• Surface electrical resistivity of concrete (AASHTO TP95)
• Density of structural lightweight concrete made in the laboratory, equilibrium or oven dry method (ASTM C567)
• Laboratory development of strength-maturity curve (ASTM C1074)
• Petrographic exam on hardened concrete (ASTM C856, ASTM C1723)
• Air void systems in hardened concrete (ASTM C457)
• W/CM determination (NT Build 361)
• Insoluble residue analysis (ASTM C1324)

Cement and Cementitious Materials

• Portland cement (ASTM C150)
• Portland limestone cement and other blended hydraulic cement (ASTM C595)
• Shrinkage-compensating cement (ASTM C845)
• Other hydraulic cement (ASTM C1157)
• Rapid hardening hydraulic cement (ASTM C1600)
• Plastic (stucco) cement (ASTM C1328)
• Fly ash and natural pozzolan (ASTM C618)
• Slag cement (ASTM C989)
• Silica fume (ASTM C1240)
• Alternative supplementary cementitious materials (ASTM C1709)
• Restrained expansion of Type K cement mortar (ASTM C806)
• Sulfate resistance of hydraulic cement (ASTM C1012)
• Sulfate resistance of Portland cement (ASTM C452)
• Expansion of hydraulic cement mortar in water (ASTM C1038)
• Effectiveness of Pozzolan & Slag Cement in Mitigating Expansion due to ASR (ASTM C441)

Aggregate

• Abrasion resistance (ASTM C131)
• Clay lumps and friable particles (ASTM C142)
• Cleanness value (CTM 227)
• Chloride and sulfate content (CTM 417, CTM 422)
• Crushed/fractured particles (ASTM D5821, CTM 205)
• Durability Index (ASTM D3744, CTM 229)
• Fine aggregates angularity (ASTM C1252, CTM 234, AASHTO T304)
• Flat and elongated particles (ASTM D4791)
• Moisture content of soil or rock (ASTM D2216, CTM 226)
• R Value (ASTM D2844, CTM 217)
• Sieve analysis (ASTM C136, CTM 202)
• No. 200 wash (ASTM D1140, CTM 202)
• Sieve with Hydrometer (ASTM D422, D7928, CTM 203)
• Soundness (ASTM C88)
• Specific gravity and absorption (ASTM C127, ASTM C128)
• Swell/Settlement potential (ASTM D4546)
• Bulk density and voids in aggregates (ASTM C29, CTM 212)
• Lightweight particles in aggregates (ASTM C123)
• Evaluation of alkali-silica reactivity of aggregates and aggregate-cementitious combinations (ASTM C1260, ASTM C289, ASTM C1293, ASTM C1567, ASTM C1778)
• Qualification of aggregates for use in concrete (ASTM C33)
• Qualification of lightweight aggregates for use in concrete (ASTM C330)
• Qualification of concrete aggregates per requirements of Caltrans, Greenbook, FAA, and other agencies
• Aggregate certification for deleterious materials per USACE scope
• Petrographic examination of aggregates (ASTM C295)
• Scratch hardness of aggregates (CRD-C 130)
• Resistance of rock to freezing and thawing (CRD-C 144)

Chemical Admixtures for Concrete

• Chemical admixtures for concrete (ASTM C494)
• Air-entraining admixtures for concrete (ASTM C260)

Mortars, Grouts, and Portland Cement Products

• Mortar for unit masonry (ASTM C270)
• Packaged Dry, Hydraulic-Cement Grout Non-shrink (ASTM C1107)
• Packaged, Dry, Rapid-Hardening Cementitious Materials for Concrete Repairs (ASTM C928)
• Mortars for plain and reinforced unit masonry (ASTM C780)
• Sampling and testing grout for masonry (ASTM C1019)
• Non-shrink grout: height change after final set (ASTM C1090)
• None-shrink grout: height change at early age (ASTM C827)
• Compressive strength of mortar cubes (ASTM C109)
• Bond strength by slant shear (ASTM C882)

Concrete Roof Fill: Gypsum, Vermiculite, Perlite, Lightweight Insulating Concrete, Etc.

• Compression test and lightweight insulating concrete (ASTM C495)
• Air-dry density of gypsums, gypsum plasters, and gypsum concretes (ASTM C472)
• Compressive strength of gypsums, gypsum plasters, and gypsum concretes (ASTM C472)