Announcement of New Service Launch: "Adhesion and Bond Strength Testing for Repair Mortars (JIS A 6909, 6916, 1171)"

The Japan Quality Assurance Organization (JQA), headquartered in Chiyoda-ku, Tokyo, and led by President Hiroaki Ishii, has newly launched the "Adhesion and Bond Strength Testing for Repair Mortars" service in May 2026. This service is intended to confirm the quality and performance of repair mortars widely used in the field of repair and reinforcement of concrete structures.

In the sectional repair of concrete structures such as bridges and buildings, the adhesion and bond performance between the repair material and the existing concrete are extremely important. Insufficient performance in these areas can lead to peeling of the repaired section or early deterioration, potentially requiring re-repairs and reducing the safety of the structure.

Confirmation through this testing can prove that the repair material integrates sufficiently with the existing concrete and plays a crucial role.

【Test Specimen】A backing plate and steel jig are attached to a mortar substrate. The number of specimens required is 3 to 5 depending on the standard. 【Adhesion (Bond) Strength Test Status】Adhesion (bond) strength is confirmed by pulling the specimen upwards and downwards.

Test Standards

① JIS A 6909 7.10 Adhesion Strength Test

② JIS A 6916 7.13 Adhesion Strength Test

③ JIS A 1171 7.4 Bond Strength Test

Cited Standards

・NEXCO Construction Work Management Manual

Our service, which includes the sale of test substrates and jig attachment work, also contributes to reducing the burden of test preparation.

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【Japan Quality Assurance Organization (JQA)】

Established in 1957, JQA is a fair and neutral third-party conformity assessment organization that has consistently supported the development of Japan's manufacturing and service industries. Currently, it is a certification body with the largest number of management system standard audits in Japan, including ISO 9001 and ISO 14001 (※). It is also a calibration body that provides calibration of measuring instruments in the largest range of fields in Japan, supplying national measurement standards to industry. Furthermore, as a designated body for domestic and international laws and certification systems, JQA conducts electrical safety certification and testing for electrical products, medical devices, and automotive equipment, JIS mark certification, as well as testing and inspection of construction materials, and examination and evaluation of corporate activities aimed at achieving goals such as carbon neutrality, offering a wide variety of services.

※According to JQA research / as of the end of March 2026.