-
Anonymous users2024-02-06Concrete durability generally includes indicators:
Carbonization of concrete:
rust of steel bars in concrete;
alkali-aggregate reaction;
freeze-thaw failure of concrete;
Chloride attack.
Concrete durability testing items.
1. Electric flux: the electric flux through the concrete is used to reflect the chloride ion permeation resistance of concrete;
2. Concrete frost resistance marking: the frost resistance grade of concrete divided by the maximum number of freeze-thaw cycles measured by the slow freezing method;
3. Concrete frost resistance grade: the frost resistance grade of concrete divided by the maximum number of freeze-thaw cycles measured by the fast-freezing method;
4. Sulfate resistance grade: the sulfate erosion resistance grade of concrete divided by the maximum number of dry and wet cycles measured by the sulfate resistance test method;
5. Rapid chloride ion mobility coefficient method: by measuring the chloride ion permeability depth in concrete, the chloride ion mobility coefficient is calculated to reflect the chloride ion permeability resistance of concrete - referred to as RCM method;
6. Early crack resistance test: used to test the early crack resistance of concrete specimens under constraint conditions;
7. Water permeation resistance test
1) Water seepage height method: used to determine the water permeability resistance of concrete expressed by measuring the average water seepage height of concrete under constant water pressure;
2) Stepwise pressurization method: It is used to determine the water permeability resistance of concrete expressed by impermeability grade by applying water pressure step by step.
8. Abrasion resistance:
9. Reinforcement protection.
10. Alkali aggregate reaction.
-
Anonymous users2024-02-05Your question is more esoteric.
The durability of concrete refers to the ability of concrete to resist the action of various damaging factors and maintain its strength and appearance integrity for a long time under actual use conditions. Concrete durability refers to the ability of a structure to maintain its safety, normal use and acceptable appearance within the specified service life and under various environmental conditions without additional cost reinforcement treatment.
To put it simply, the durability indicators of concrete materials generally include:
1. Impermeability.
2. Frost resistance.
3. Erosion resistance.
4. Carbonization (neutralization) of concrete
5. Alkali aggregate reaction.
There are a lot of things that come up with this question.
-
Anonymous users2024-02-04The durability of concrete includes impermeability, frost resistance, wear resistance, and erosion resistance, among others.
1. Impermeability.
Refers to the ability of concrete to resist the infiltration of pressurized water without being destroyed.
2. Frost resistance.
Frost resistance refers to the performance of concrete in a saturated state without seriously reducing the strength of concrete after multiple freeze-thaw cycles.
3) Abrasion resistance.
It refers to the performance of resisting the erosion and abrasion of high-speed water flow or sediment-carrying water flow.
4) Erosion resistance.
It refers to the performance of concrete to resist environmental water erosion.
-
Anonymous users2024-02-03To put it simply, the durability indicators of concrete materials generally include: impermeability, frost resistance, erosion resistance, carbonization (neutralization) of concrete, and alkali aggregate reaction.
Durability test items: electric flux, concrete frost resistance number, concrete frost resistance grade, sulfate resistance grade, rapid chloride ion mobility coefficient method, early crack resistance test, water penetration resistance test, wear resistance (common methods include ring method, wind sand method), reinforcement protection, alkali aggregate reaction.
-
Anonymous users2024-02-02"Durability of concrete structures"
Interpretation in the academic literature.
1. The so-called durability of concrete structure refers to the resistance of the structure to climatic action, chemical erosion, physical action or any other damage process. There are many factors that cause poor durability of concrete structures, and steel corrosion is one of the most harmful and important factors.
2. The durability of concrete structure refers to the ability of the structure to maintain its safety, use function and appearance requirements without spending a lot of money on reinforcement within the target service life required by the design.
3. The durability of concrete structure refers to the ability of concrete structure to ensure safety and applicability without a large amount of reinforcement treatment during the target service period required by the design.
4. The durability of concrete structure refers to the resistance of concrete structure to the failure process, which is based on the further deepening of material durability. The main factor affecting the durability of concrete structures is the properties of the concrete material itself.
-
Anonymous users2024-02-01The durability of concrete means that the concrete structure or component can meet the requirements for normal use and safety functions without major repairs under normal maintenance conditions during the predetermined design working life.
Factors influencing the durability of concrete structures.
1.Concrete carbonization.
2.Alkali aggregate reaction of concrete.
3.Freeze-thaw of concrete.
4.Corrosion of steel bars.
5.Cracks in concrete.
6.mechanical wear and weathering of the surface of the components, etc.
-
Anonymous users2024-01-31The durability of concrete includes impermeability, frost resistance, wear resistance, and erosion resistance
1. Impermeability refers to the ability of concrete to resist pressure water penetration without being damaged.
2. Frost resistance refers to the performance of concrete in a saturated state without seriously reducing the strength after multiple freeze-thaw cycles.
3. Abrasion resistance refers to the performance of resisting the erosion and abrasion of high-speed water flow or sand-carrying water flow.
4. Erosion resistance refers to the performance of concrete to resist environmental water erosion.
-
Anonymous users2024-01-30Concrete durability refers to the ability of concrete to resist the action of environmental media and maintain its good performance and appearance integrity for a long time, so as to maintain the safety and normal use of concrete structures.
Concrete, for short"Concrete (tóng).": refers to the general term of engineering composite materials that cement aggregates into a whole by cementitious materials. The word concrete usually refers to the use of cement as cementitious material, sand and stone as aggregates; Cement concrete, also known as ordinary concrete, is widely used in civil engineering engineering when it is mixed with water (which can contain admixtures and admixtures) in a certain proportion and is mixed to obtain cement concrete.
Concrete has the characteristics of abundant raw materials, low cost and simple production process, so that the amount of concrete is getting larger and larger. At the same time, concrete also has the characteristics of high compressive strength, good durability and wide range of strength grades. These characteristics make it widely used, not only in various civil engineering projects, but also in shipbuilding, machinery industry, marine development, geothermal engineering, etc., concrete is also an important material.
-
Anonymous users2024-01-29The durability of concrete includes impermeability, frost resistance, wear resistance, and erosion resistance, among others.
1) Impermeability refers to the ability of concrete to resist the infiltration of pressure water without being destroyed.
2) Frost resistanceFrost resistance refers to the performance of concrete in a saturated state without seriously reducing the strength after multiple freeze-thaw cycles.
3) Abrasion resistance refers to the performance of resisting the erosion and abrasion of high-speed water flow or sediment-carrying water flow.
4. Erosion resistance refers to the performance of concrete to resist environmental water erosion.
-
Anonymous users2024-01-28Answers]: a, c, Zheng Chund, e
In addition to the design strength, concrete should also have impermeability, frost resistance, impact abrasion resistance, cavitation resistance, alkali aggregate reaction of concrete, carbonization of concrete, etc., collectively referred to as concrete durability.
-
Anonymous users2024-01-27Answers]: a, c, d, e
The durability of concrete includes impermeability, frost resistance, impact resistance, erosion resistance, carbonization resistance, etc.
The workability of concrete refers to whether the composition of the concrete mixture can be kept uniform, and whether it is easy to pour and vibrate during production and operation. >>>More
Foreign currency monetary items refer to the monetary funds held by the enterprise and the assets or liabilities to be repaid in a fixed or determinable amount. Monetary items are divided into monetary assets and monetary liabilities. Monetary assets include cash, bank deposits, accounts receivable, and other receivables. >>>More
1. The subject of the administrative act is legitimate.
The so-called legitimacy of the subject means that the organization that makes the administrative act must have an administrative subject. >>>More
Blue whales, finwhales, chalktail baleen whales, gibbon whales, gibbon whales and right whales, humpback whales, beluga whales, gray whales and other toothed whales are sperm whales, orcas, narwhals, dolphins, porpoises, porpoises, etc.
Hypertrophic rhinitis is transformed from simple rhinitis, so the general symptoms of hypertrophic rhinitis are the same as simple rhinitis, but of course more severe. First of all, nasal congestion changes from intermittent or alternating in simple rhinitis to persistent nasal congestion, and the sense of smell is also significantly reduced, and patients often have symptoms such as head swelling, headache, mental malaise, insomnia, and memory loss. >>>More