News

PG grading of asphalt is the asphalt performance grading standard proposed in the US SHRP plan. It is graded according to the road performance of asphalt. PG is Performance Grade, which means performance grading in Chinese.

Asphalt ductility refers to the ductility of asphalt. The asphalt ductility test is to make asphalt into an 8-shaped standard test piece. According to the requirements, the temperature is usually 25℃, 15℃, 10℃, and 5℃, and the length (cm) when it is stretched to the breaking point at a speed of 5...

As one of the three major indicators for asphalt evaluation, softening point has an important impact on the performance of asphalt materials and road engineering. First, asphalt softening point is one of the important factors to measure asphalt adhesion. The higher the softening point of asphalt,...

The basic principle of resonance column test, in short, is to use a specially designed device to excite a cylindrical rock and soil sample, causing it to produce horizontal torsional vibration or vertical vibration, and achieve Resonance of vibration modes. Under this resonance condition, measur...

With the rapid development of science and technology, testing instruments, as one of the indispensable tools in scientific research, production and other fields, have also developed rapidly in Xi'an. First of all, Xi'an has rich talent resources and superior geographical location, which provides...

There are many technical misconceptions among testing machine procurement personnel regarding the selection of testing machines. We are now organizing the existing problems in the hope of providing assistance to users in their selection process! Xi'an Concrete Testing Instrument Sharing: Technica...

The test indicators of soil include physical indicators (weight, water content, soil particle density, etc.) and mechanical indicators (shear strength, compression modulus, permeability coefficient, etc.). Soil sampling should be carried out during engineering geological survey, and specific data...

Introduction to asphalt mixture Asphalt mixture is a general term for a mixture made by mixing mineral aggregates and asphalt binders. According to the material composition and structure, it is divided into continuous grading and discontinuous grading mixtures. According to the mineral grading c...

One of the main quality indicators of asphalt Asphalt is a viscous, black, and highly viscous liquid or semi-solid form of petroleum with a black surface that is soluble in carbon disulfide and carbon tetrachloride. It can be mainly divided into three types: coal tar pitch, petroleum pitch, and ...

Point load test is a common method for determining the strength of geotechnical materials (such as rocks and soil samples). During the test, the following key issues should be noted to ensure the accuracy of the results:

I.Electronic material tester II. Material impact tester III. Resin transfer molding injection system IV. Rectangular modular combination 3D braiding machine V. Rotational rheometer VI. Sound absorption coefficient test system (JIZB standing wave tube) VII. Fully automatic true density and o...