(2) Test personnel should strictly comply with national, industry, and local testing standards, as well as relevant specifications, regulations, technical documents, etc.
.
precast-tech
precast technology developments
Non destructive evaluation of mixed concrete performance using image processing and machine learning
The study prepared HC samples with different mix ratios (1:3:6, 1:2:4, 1:1.
5:3), water cement ratios (0.
4-0.
6), and CRM substitution rates (0%, 15%, 25%) using 162 cylindrical specimens (diameter 150mm, height 300mm).
Horizontal and vertical cutting surface images were collected, and statistical features were extracted to train SVM, BRE, and GPR models.
The overall process is shown in Figure 1.
.
How many stones, sand, cement, and water are needed for one square meter of concrete in rural self built houses?
More and more people are building houses in rural areas, and with them, there are not too many knowledgeable people.
So the problem is, how can those who don’t understand learn? As we all know, concrete is the most common building material.
However, in rural housing construction, due to the relatively small amount of construction, most of it is self mixed concrete, which can be mixed as much as needed and used on-site without waste.
.
GBT50082-2024 Standard for Test Methods of Long term Performance and Durability of Concrete
Today, Swordsman will share with you an electronic PDF version of the “Test Method Standard for Long term Performance and Durability of Concrete” (GBT50082-2024).
For us designers, electronic tools are very convenient and fast.
Let’s take a look together~.
Engineering English | Comprehensive Analysis of Concrete “Diseases” – Causes, Detection, and Prevention Tips
Today, we will systematically review common concrete defects and provide you with a practical “Diagnosis and Prevention Manual” from three dimensions: causes, detection, and prevention.
.
Real image recognition of several common concrete cracks
Concrete cracks are physical structural changes caused by internal and external factors in concrete structures, and cracks are the main reason for the decrease in the load-bearing capacity, durability, and waterproofing of concrete structures.
Only by correctly identifying the causes of concrete cracks, taking corresponding measures, and eliminating hidden dangers can we ensure structural safety and normal use.
.
Why does the surface of concrete exhibit a “blue-green color”
Hardened slag concrete may exhibit mottled green or blue-green areas on the surface in the first few days after pouring.
This brief appearance is commonly referred to as the “blue-green hue” of concrete.
.
The technical leader must be familiar with the template technical standards for the steel-concrete composite construction plan
1) The steel-concrete composite structure has a large number of internal steel bars with large specifications, and the bolts on the steel frame are dense.
The processing of stirrups and hooks is complex, and the binding is inconvenient;.
Why is concrete called ‘concrete’? 80% of engineers are unaware of their origins!
Those who study engineering, especially civil engineering related majors, as well as those engaged in civil engineering project design, construction, supervision, and budgeting, inevitably have to deal with the word “tong” frequently.
Speaking of the word ‘concrete’, it’s a bit awkward.
.
Concrete film curing leaves no footprints! This construction site is creative!
In order to reduce the quality problem of floor cracks, the concrete pouring is completed and the surface is immediately covered with film for curing.
Practice has shown that it is indeed effective.
However, due to the fact that the concrete has not yet fully set at this time, people will leave footprints on the film.
The conventional method of covering the film while smoothing the footprints is too cumbersome and has quality hazards.
Let’s take a look at the creativity of this construction site below, which easily solves the problem of people stepping on footprints on concrete film!.