Method 1: Enhance technical level, stabilize item top quality, and reinforce technical books:
According to the survey, just a couple of manufacturers of polycarboxylic acid water reducer products in my nation are separately developed, and the majority of various other suppliers introduce innovation from university research study institutions or study institutes or straight introduce modern technology from other companies to begin manufacturing. Because of the restricted technological stamina of the manufacturers themselves, they do not have a deep understanding of the polycarboxylic acid water reducer technology they generate, and it is tough to adjust to numerous adjustments in resources and procedures, and there is no other way to speak about the security of product quality. Consequently, it is recommended that polycarboxylic acid water-reducing representative producers actively cooperate with colleges and research institutes to completely recognize the various aspects influencing the performance of polycarboxylic acid water-reducing representative items, change the synthesis process criteria in a timely way to support item top quality, and enhance technical reserves via joint or independent r & d to adapt to market demand. On top of that, the early release of polycarboxylic acid water-reducing agent resources standards and the security of polycarboxylic acid water-reducing representative resources costs are additionally very important to make certain the security of polycarboxylic acid water-reducing representative item efficiency.
Technique 2: Belief in test outcomes as opposed to product requirements
Some products that are fantastic in the water-reducing representative requirements, or even products with outstanding examination outcomes, might not appropriate for a details project. On the other hand, some products might satisfy the requirements of concrete product prep work for a specific task despite the fact that the examination outcomes are not extremely superior. Furthermore, because of adjustments in resources, the test results during job bidding process can not stand for the actual execution of the job. GB50119-2003 “Technical Specs for Application of Concrete Admixtures” “2.1.4” clearly states: The raw products used in concrete with admixtures, such as concrete, sand, rock, admixtures, and admixtures, shall adhere to the arrangements of the relevant national requirements in force; when trial-mixing concrete with admixtures, the raw materials used in the task shall be made use of, and the examination things will be identified according to the style and building and construction requirements. The test conditions shall coincide as the building and construction conditions. When the raw products used in the project or the concrete performance needs alter, the trial-mixing test shall be performed again.
(Cabr superliasticizer)
Technique 3: Prevent contact between polycarboxylic acid water reducers and iron materials
For polycarboxylic acid water reducer makers and suppliers, special production devices and assembly line will be made use of to manufacture and compound polycarboxylic acid water reducers, and polycarboxylic acid water reducers shall not be synthesized or intensified using the very same assembly line as other water reducers. In addition, the transportation and storage of polycarboxylic acid water reducers shall not use iron products (except stainless steel) yet plastic, glass and various other products. Call with iron sometimes causes adjustments in the efficiency of polycarboxylic acid water reducers.
Approach 4: Resolutely avoid mixing various other kinds of admixtures
It is strictly restricted to blend various other water reducers or other types of admixtures. There are 2 significances. First, the compounding of polycarboxylic acid water reducers (such as with lignin sulfonate, air entrainment, defoaming, slowing down and other elements) can only be executed by admixture suppliers or providers. The user of the water reducer, that is, the concrete preparer, just needs to evaluate and keep its pertinent efficiency. No other parts may be worsened in it, nor may other elements be blended in it due to oversight. It is definitely forbidden to make use of pumps and metering devices for pumping and metering other admixtures without cleaning. An additional meaning is that concrete mixing tools, transport lorries, and pumping equipment are best utilized for concrete mixed with polycarboxylic acid water reducers. When sharing blending devices, transport cars and pumping tools, these devices needs to be completely cleaned up prior to they can be made use of for concrete blended with other sorts of admixtures, and the other way around.
Approach 5: Strictly determine the water reducer and mix water
When preparing concrete mixtures with polycarboxylic acid water reducers, the ideal water reducer dose and water usage figured out by the lab must be purely gauged. Do not increase the water reducer dosage or water usage at will to avoid damaging phenomena such as partition, bleeding, hardening, and raised air web content in the blended concrete, which will certainly affect the normal pumping construction and putting high quality of the concrete.
The moisture had in the raw materials sand and rock accumulations need to be accurately determined and subtracted from the complete water usage to stop unfavorable repercussions brought on by inaccurate detection of the dampness had in the sand and rock accumulations.
( concrete addtives)
Method 6: Appropriately encounter the compatibility issue of polycarboxylic acid water reducers and cement/admixtures
The compatibility issue of admixtures and cement/admixtures has a long history. For many years, the flexibility research study work on naphthalene-based high-efficiency water-reducing agents and their substance products has actually accomplished great results:
With the hard work of scientists, concrete preparers, admixture manufacturers, cement and admixture suppliers, concrete builders and supervisors have actually jointly acknowledged this problem, changing the circumstance in which admixture suppliers and vendors have actually constantly assumed all responsibilities.The conflict of admixtures and cement/admixtures is attributed to many influencing elements, and in-depth research study has actually been executed on their influencing regulations. A series of reliable services have actually been explored for the details conflict between admixtures and cement/admixtures.
Method 7: Purely manage the vibration distance and resonance time
Given that the slump of concrete prepared with polycarboxylic acid-based water-reducing representatives is normally huge and the thickness of the blend is reduced, the resonance distance and vibration time after the concrete blend is poured need to be identified via experiments or should be directed by experts. Suppose the vibration span is as well tiny or the vibration time is as well long. In that case, it is simple to create structural flaws such as a severe decrease in concrete air material and significant stratification of the accumulated stage and paste stage.
Technique 8: Strengthen preliminary maintenance and avoid splitting.
On any kind of event, for any concrete mix, preliminary and later upkeep after putting is very important.
Polycarboxylic acid water reducer has little effect on the shrinkage performance of concrete; simply put, the addition of polycarboxylic acid water reducer does not exceedingly enhance the shrinking of concrete, which does not suggest that the concrete with polycarboxylic acid water reducer can kick back and even cancel the upkeep.
Like concrete with other admixtures, the secondary surface smearing, film covering or spraying of concrete with polycarboxylic acid water reducer after pouring and resonance is really reliable in stopping its plastic shrinking fractures. Continuous 7d or 14d hydrating maintenance is not only necessary for the normal growth of concrete strength however additionally an assurance to avoid its drying out shrinkage cracks.
( foamed concrete)
In order to enhance the split resistance of concrete with polycarboxylic acid, it is additionally needed to include a particular quantity of fiber, and this type of concrete still requires good damp healing to guarantee that the structure does not crack.
Technique 9: Building and administration units need to work carefully with concrete preparation and admixture suppliers
In the job, it is inevitable to come across different technical problems, technical disagreements and even conflicts and conflicts caused by engineering mishaps. The best objective of all events involved in the task is to make certain the smooth progression of the project and the top quality of the job. The history of polycarboxylic acid water reducers in manufacturing and application in actual jobs is really brief, and the collected design experience could be far better. It is simple to experience application issues and even lead to engineering accidents currently, the construction unit or administration device needs to function very closely with the concrete prep work, polycarboxylic acid water reducer production and supply, and cement/admixture production and supply from a technological viewpoint and conduct in-depth analysis to propose efficient services.
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