Method 1: Improve technical level, support item top quality, and reinforce technological gets:
According to the survey, only a few manufacturers of polycarboxylic acid water reducer products in my nation are individually created, and most other suppliers introduce technology from college study institutions or research study institutes or directly introduce technology from various other business to begin production. Because of the restricted technical toughness of the manufacturers themselves, they do not have a deep understanding of the polycarboxylic acid water reducer modern technology they generate, and it is challenging to adjust to various adjustments in basic materials and procedures, and there is no way to talk about the stability of item high quality. Consequently, it is suggested that polycarboxylic acid water-reducing agent producers proactively cooperate with colleges and research institutes to totally understand the various factors impacting the performance of polycarboxylic acid water-reducing agent products, change the synthesis process specifications in a prompt way to stabilize item top quality, and reinforce technological reserves through joint or independent research and development to adjust to market demand. In addition, the early release of polycarboxylic acid water-reducing agent raw material requirements and the stability of polycarboxylic acid water-reducing representative raw material costs are likewise extremely vital to make sure the stability of polycarboxylic acid water-reducing representative product performance.
Method 2: Belief in examination outcomes as opposed to item requirements
Some items that are outstanding in the water-reducing agent specifications, or perhaps items with outstanding examination results, may not be suitable for a particular job. However, some items may fulfill the demands of concrete material preparation for a specific task even though the examination results are not very outstanding. On top of that, because of adjustments in basic materials, the test results throughout task bidding process can not represent the real implementation of the project. GB50119-2003 “Technical Spec for Application of Concrete Admixtures” “2.1.4” clearly specifies: The raw materials made use of in concrete with admixtures, such as concrete, sand, rock, admixtures, and admixtures, will abide by the arrangements of the relevant nationwide criteria active; when trial-mixing concrete with admixtures, the raw materials utilized in the job will be made use of, and the examination products will be established according to the style and construction needs. The test conditions will coincide as the building and construction problems. When the raw materials used in the task or the concrete performance demands transform, the trial-mixing test shall be carried out again.
(Cabr superliasticizer)
Method 3: Prevent call between polycarboxylic acid water reducers and iron products
For polycarboxylic acid water reducer suppliers and providers, special manufacturing devices and production lines shall be made use of to manufacture and worsen polycarboxylic acid water reducers, and polycarboxylic acid water reducers will not be manufactured or worsened making use of the exact same production line as various other water reducers. In addition, the transportation and storage space of polycarboxylic acid water reducers will not use iron materials (except stainless-steel) yet plastic, glass and other materials. Contact with iron often creates modifications in the performance of polycarboxylic acid water reducers.
Approach 4: Resolutely avoid mixing other kinds of admixtures
It is purely restricted to blend other water reducers or other types of admixtures. There are two significances. First, the compounding of polycarboxylic acid water reducers (such as with lignin sulfonate, air entrainment, defoaming, retarding and other parts) can just be performed by admixture makers or suppliers. The individual of the water reducer, that is, the concrete preparer, only needs to evaluate and store its pertinent performance. No other components may be worsened in it, nor may various other elements be mixed in it due to negligence. It is definitely prohibited to use pumps and metering devices for pumping and metering various other admixtures without cleaning. Another meaning is that concrete combining equipment, transportation automobiles, and pumping devices are best utilized for concrete mixed with polycarboxylic acid water reducers. When sharing mixing tools, transportation cars and pumping devices, these devices should be completely cleaned prior to they can be utilized for concrete combined with various other sorts of admixtures, and vice versa.
Approach 5: Purely measure the water reducer and mix water
When preparing concrete mixes with polycarboxylic acid water reducers, the optimal water reducer dosage and water intake figured out by the laboratory should be purely determined. Do not enhance the water reducer dosage or water intake at will certainly to avoid negative sensations such as segregation, bleeding, solidifying, and increased air web content in the combined concrete, which will influence the normal pumping building and putting high quality of the concrete.
The wetness included in the raw materials sand and rock accumulations need to be properly gauged and subtracted from the overall water intake to avoid unfavorable repercussions caused by imprecise detection of the wetness contained in the sand and stone aggregates.
( concrete addtives)
Technique 6: Properly encounter the compatibility issue of polycarboxylic acid water reducers and cement/admixtures
The compatibility issue of admixtures and cement/admixtures has a lengthy history. Throughout the years, the flexibility research service naphthalene-based high-efficiency water-reducing agents and their compound products has attained good outcomes:
With the effort of researchers, concrete preparers, admixture producers, cement and admixture producers, concrete producers and supervisors have actually jointly acknowledged this problem, changing the circumstance in which admixture suppliers and providers have always assumed all obligations. The incompatibility of admixtures and cement/admixtures is attributed to lots of affecting aspects, and in-depth study has been carried out on their affecting regulations. A series of efficient solutions have been explored for the specific conflict in between admixtures and cement/admixtures.
Technique 7: Strictly manage the resonance distance and resonance time
Since the depression of concrete prepared with polycarboxylic acid-based water-reducing representatives is usually large and the thickness of the blend is low, the resonance distance and resonance time after the concrete blend is put should be determined via experiments or ought to be assisted by specialists. Suppose the vibration radius is as well small or the resonance time is as well long. Because instance, it is very easy to create architectural issues such as a major reduction in concrete air web content and major stratification of the accumulated phase and paste stage.
Technique 8: Reinforce first maintenance and protect against cracking.
On any type of occasion, for any concrete mixture, initial and later maintenance after putting is extremely vital.
Polycarboxylic acid water reducer has little effect on the shrinking performance of concrete; to put it simply, the addition of polycarboxylic acid water reducer does not exceedingly raise the contraction of concrete, which does not suggest that the concrete with polycarboxylic acid water reducer can kick back and even terminate the upkeep.
Like concrete with other admixtures, the secondary surface area denigration, movie covering or spraying of concrete with polycarboxylic acid water reducer after putting and vibration is very efficient in avoiding its plastic shrinking cracks. Continuous 7d or 14d moisturizing maintenance is not only required for the typical development of concrete toughness but additionally a guarantee to prevent its drying shrinking fractures.
( foamed concrete)
In order to boost the crack resistance of concrete with polycarboxylic acid, it is additionally essential to include a specific quantity of fiber, and this sort of concrete still needs excellent damp treating to guarantee that the framework does not break.
Approach 9: Building and monitoring systems must function carefully with concrete preparation and admixture providers
In the task, it is unavoidable to run into different technological troubles, technical disputes and even disputes and disputes triggered by engineering mishaps. The best objective of all parties associated with the task is to make certain the smooth development of the task and the quality of the job. The history of polycarboxylic acid water reducers in production and application in actual jobs is really short, and the built up engineering experience could be far better. It is very easy to run into application troubles and also cause engineering mishaps currently, the construction device or administration unit needs to function carefully with the concrete prep work, polycarboxylic acid water reducer production and supply, and cement/admixture production and supply from a technological viewpoint and conduct thorough evaluation to propose efficient solutions.
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