Schmidt Concrete Test Hammer: Original Type L

Schmidt Concrete Test Hammer: Original Type L

Concrete testing is the foundation of the construction industry, ensuring quality, strength and durability of concrete structures. Among the most widely used methods to test concrete is the concrete test hammer, also known as a rebound hammer or Schmidt hammer. This tool allows engineers and contractors to do non-destructive testing, to assess the condition of concrete without damaging it.

The rebound hammer test measures the surface hardness of concrete, which gives an estimate of the compressive strength. This method is very efficient and cost effective, that’s why it’s widely used for quality control, uniformity testing and durability assessment on various concrete applications. Whether used on-site for quick evaluation or in lab to study material properties, the concrete test hammer delivers reliable results.

Several factors can affect the rebound value during testing, the type of concrete, its moisture content, surface texture and ambient temperature. To get accurate and consistent results, you need to use a suitable test surface and apply proper impact angle correction. Following standardized testing procedure ensures that the rebound hammer method is a trusted way to assess the strength and quality of concrete, to build safe and long lasting structures.

Original Schmidt Type L Concrete Test Hammer is suitable for concrete testing in the same compressive strength range as the “standard” Type N but has lower impact energy to improve repeatability of rebound values on cross-sections thinner than 4in (100mm). This minimizes surface blemishes and damage to brittle mixes. The Type L test hammer is often used to test precast concrete pipe sections and to judge strength suitability of cast-in-place concrete for form removal. Like the Type N, the Type L is a proven, efficient tool for quick assessment of concrete condition, relative strength and homogeneity. The hammer operates by propelling a spring-loaded mass against the concrete surface to measure rebound and assess hardness. The impact plunger, made for durability and measurement accuracy, is a key part of the hammer’s construction. Accuracy can be further improved with correlation testing on compressive strength samples of identical mix design. The HM-75L can be used in ASTM test method D5873 for determination of rock core strengths.

Features:

• Proven quality and reliability from the original manufacturer* Fast and cost effective condition assessment of concrete structures and elements

• Improved repeatability for thicknesses of 4in (100mm) or less

• Impact energy of 0.735Nm (0.54ft-lbf)

• Effective on concrete with compressive strengths from 1,450 to 10,150psi (10 to 70mPa)

• Other Schmidt hammers, such as the Silver Schmidt and Original Schmidt Live models, have additional features like digital connectivity and can test concrete of various thicknesses.

Included Items:

• Original Schmidt Type L Concrete Test Hammer

• Plastic carrying case

• Carborundum stone

• Grinding stone (for maintenance or calibration)

• Reference chart

• Certificate of confomity

• For asphalt-related testing and site preparation, see our selection of asphalt tools.

• For a broader range of construction materials testing equipment, view our top picks.

Accessories:

• Test Hammer Calibration Anvil for testing calibration of concrete test hammers

Specifications

• Impact Energy: 2.207Nm (1.63ft-lbf)

• Strength: 1,450—10,152psi (10—70MPa)

• Product Dimensions: 2.1 x 14in (53 x 356mm), Dia. x H

Meets Standard(s):

• BS 1881-202

• ASTM D5873

• EN 12504-2

• ASTM C805/805M

• BS EN 13791

Applications of Schmidt Hammer

The Schmidt hammer is a versatile and essential tool in the construction and materials testing industry. Its main application is in testing concrete structures such as bridges, buildings and foundations where it provides a quick and non-destructive way to evaluate strength and overall durability. The hammer is also used for quality control and assurance of concrete products including precast elements and concrete blocks to ensure that these materials meet the required standards before they are put into service.Beyond concrete, the Schmidt hammer is used for rock testing, a reliable method to assess the strength and durability of rock formations in geotechnical and civil engineering projects. It can also be used with different impact energies, Type N and Type L hammers, to test materials of various thicknesses and strengths. It is also used in paper testing where it provides precise measurements of hardness and strength for special applications.

Complies with international standards ASTM, EN 12504-2, BS 1881-202, the Schmidt hammer is known for its accuracy and reliability. Non-destructive testing makes it the recommended tool for professionals to ensure the quality and longevity of concrete structures and other materials. With its wide range of applications and proven performance, the Schmidt hammer is a staple in the toolbox of engineers, contractors and materials scientists. fresh concrete specimens