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Test method for compressive strength of ordinary concrete

Concrete is an essential material in modern construction projects. In recent two years, due to the unqualified quality of concrete materials, building collapse accidents have been frequently seen in media reports: garage collapse, leading to the problems of concrete strength substandard of 6 buildings, concrete strength of C25 to C15, concrete strength seriously unqualified, and collapse of cooling tower construction platform due to its concrete supplier No qualification Such cases can be found everywhere on the Internet, shocking, causing property loss at least, and endangering life seriously. In order to avoid the occurrence of similar accidents to the greatest extent, we need to carry out quality inspection on the concrete materials required for construction.

2020-09-09 View details

Precautions and quality inspection of fire fighting equipment purchase

According to the fire control bureau of Chengdu recently, there were 6 batches of fire-fighting products which were not qualified in the fire-fighting market In addition, unnecessary accidents may occur.

2020-09-04 View details

Wance participated in the approval meeting of four standards including GB / T 3075 control method of axial force for fatigue test of metallic materials

On August 25, 2020, Huang Xing, vice president of wantest technology, participated in the following four standards examination and approval meeting held by the mechanical and technological performance test methods sub committee of National Steel Standards Committee in Changchun City, Jilin Province

2020-09-02 View details

Wance participated in the review meeting of 4 national standards including "plastic recycled plastics"

On August 28, 2020, the National Plastics Standardization Technical Committee held "plastic recycled plastics Part 1: General principles", "plastic recycled plastics Part 2: Polyethylene (PE) materials", "plastic recycled plastics Part 3: polypropylene (PP) materials" and "plastic recycled plastics Part 9" Part: review meeting of four national standards for polyethylene terephthalate (PET) materials. The meeting was organized by China Blue Chenguang Testing Technology Co., Ltd., and the main participants were the member units of the plastic Standard Committee, some customs inspection units and related recycled plastics production and application enterprises. Shenzhen wance Test Equipment Co., Ltd. participated in the meeting as a member unit.

2020-09-02 View details

The collapse of a hotel in Linfen, Shanxi Province, is an urgent task to supervise the quality of building construction

On August 29, a second floor hotel in Xiangfen County, Linfen, Shanxi Province collapsed seriously, causing many people to be buried. Local police and ambulances rushed to the scene to participate in the rescue. Finally, 57 people were rescued. Among them, 29 were confirmed dead, 7 were seriously injured, and the rest were slightly injured. They were all sent to the hospital for treatment.

2020-09-01 View details

Drop weight tear test method for steel

The drop weight tear test of steel is a kind of test in which the sample in simply supported beam state is broken by a certain height drop hammer or pendulum at one time, and the relevant performance results are evaluated. This paper will introduce the steel drop weight tear test method according to GB / t8363-2018.

2020-08-31 View details

The new version of the national standard for safety helmet has come into effect on July 1

The State Administration of market supervision and the State Commission of standards approved and issued the new version of safety helmet standard gb2811-2019, which has been officially effective since July 1, 2020. The standard is applicable to the safety helmet used for head protection in workplace, but not applicable to head protection articles for fire protection, emergency rescue, sports and vehicles.

2020-08-28 View details

Basic knowledge and acceptance criteria of wire rope

Steel wire rope is a kind of spiral steel wire bundle which can meet the requirements of mechanical properties and geometric dimensions according to certain rules. The steel wire rope is composed of steel wire, rope core and grease. Steel wire rope is a kind of rope that is twisted into strands by multi-layer steel wire, and then twisted into spiral shape by a certain number of strands with the core as the center. In material handling machinery, steel wire rope is used for lifting, traction, tension and bearing. The steel wire rope has the advantages of high strength, light weight, stable operation, not easy to break the whole rope suddenly, and the work is reliable.

2020-08-25 View details

Difference between electronic universal testing machine and hydraulic universal testing machine

Although electronic universal testing machine and hydraulic universal testing machine belong to mechanical test equipment, due to their great differences in driving power source, main body structure and application expansibility, they have their own characteristics in practical application. The following is a brief introduction to the specific differences between the two, hoping to help you better choose the right products.

2020-08-20 View details

Congratulations on the successful conclusion of the 20th National Conference on fatigue and fracture

Congratulations on the successful conclusion of the 20th National Conference on fatigue and fracture in Chongqing from August 18 to 20, 2020.

2020-08-20 View details

Basic knowledge and mechanical test of Geotextile

Geotextile, also known as geotextile, is a kind of permeable geosynthetics which is made of synthetic fiber by needling or weaving. Geotextile is one of the new materials geosynthetics. The finished product is cloth like, with a width of 4-6 meters and a length of 50-100 meters. Geotextile and non-woven geotextile.

2020-08-19 View details

The foundation of several foreign houses in Chongqing has been settled, so the construction quality and safety problems should be paid attention to

A few days ago, according to the Chongqing Economic Development Zone Construction Management Bureau, the dongyuefu real estate project located beside Chafu road in Jiangnan New City is about to be reworked and reconstructed. The relevant responsible units will compensate the owner for the performance of the contract according to the contract.

2020-08-18 View details