Teach you how to use polycarboxylate water reducer safely! superplasticizer
Method 1: Improve technological level, support item high quality, and reinforce technical reserves:
According to the study, just a couple of manufacturers of polycarboxylic acid water reducer items in my country are individually established, and many other makers introduce innovation from university research study organizations or study institutes or straight introduce modern technology from various other companies to begin production. As a result of the restricted technological strength of the suppliers themselves, they do not have a deep understanding of the polycarboxylic acid water reducer innovation they create, and it is hard to adjust to different adjustments in resources and processes, and there is no other way to talk about the stability of item quality. For that reason, it is suggested that polycarboxylic acid water-reducing representative suppliers actively cooperate with universities and research study institutes to totally recognize the various aspects influencing the efficiency of polycarboxylic acid water-reducing representative products, readjust the synthesis process parameters in a timely way to support product top quality, and strengthen technical reserves via joint or independent r & d to adjust to market demand. Furthermore, the very early release of polycarboxylic acid water-reducing agent raw material criteria and the stability of polycarboxylic acid water-reducing agent resources prices are additionally very vital to make sure the stability of polycarboxylic acid water-reducing representative item performance.
Technique 2: Idea in test results rather than product requirements
Some items that are impressive in the water-reducing agent requirements, or perhaps items with excellent examination outcomes, may not appropriate for a particular job. On the other hand, some products might meet the requirements of concrete product prep work for a particular project even though the examination results are not really superior. In addition, due to changes in raw materials, the test results throughout task bidding can not stand for the actual application of the project. GB50119-2003 “Technical Specifications for Application of Concrete Admixtures” “2.1.4” clearly states: The raw materials made use of in concrete with admixtures, such as concrete, sand, stone, admixtures, and admixtures, will adhere to the arrangements of the pertinent nationwide requirements effective; when trial-mixing concrete with admixtures, the raw products made use of in the task will be made use of, and the test products shall be figured out according to the design and building and construction requirements. The test problems will be the same as the building conditions. When the raw products utilized in the task or the concrete efficiency requirements alter, the trial-mixing examination shall be performed once again.
(Cabr superliasticizer)
Technique 3: Avoid contact in between polycarboxylic acid water reducers and iron products
For polycarboxylic acid water reducer suppliers and distributors, special production equipment and production lines shall be made use of to manufacture and compound polycarboxylic acid water reducers, and polycarboxylic acid water reducers will not be manufactured or compounded utilizing the same production line as other water reducers. Furthermore, the transport and storage of polycarboxylic acid water reducers will not make use of iron products (other than stainless-steel) however plastic, glass and other products. Contact with iron in some cases triggers changes in the performance of polycarboxylic acid water reducers.
Technique 4: Resolutely avoid blending various other types of admixtures
It is purely prohibited to blend various other water reducers or other kinds of admixtures. There are 2 meanings. First, the compounding of polycarboxylic acid water reducers (such as with lignin sulfonate, air entrainment, defoaming, hampering and various other parts) can just be executed by admixture makers or vendors. The user of the water reducer, that is, the concrete preparer, only needs to examine and keep its pertinent performance. No other components may be worsened in it, neither might various other elements be mixed in it because of negligence. It is absolutely forbidden to make use of pumps and metering tools for pumping and metering various other admixtures without cleansing. Another definition is that concrete mixing equipment, transportation automobiles, and pumping equipment are best made use of for concrete mixed with polycarboxylic acid water reducers. When sharing blending devices, transportation lorries and pumping equipment, these equipment must be extensively cleaned up prior to they can be made use of for concrete mixed with various other kinds of admixtures, and vice versa.
Method 5: Strictly determine the water reducer and mix water
When preparing concrete blends with polycarboxylic acid water reducers, the optimal water reducer dosage and water consumption determined by the laboratory should be purely gauged. Do not raise the water reducer dosage or water consumption at will certainly to prevent adverse phenomena such as segregation, blood loss, hardening, and enhanced air material in the blended concrete, which will certainly influence the normal pumping building and construction and pouring high quality of the concrete.
The dampness included in the raw products sand and stone aggregates need to be precisely determined and deducted from the complete water intake to stop negative repercussions triggered by unreliable discovery of the moisture included in the sand and stone aggregates.
( concrete addtives)
Approach 6: Correctly encounter the compatibility trouble of polycarboxylic acid water reducers and cement/admixtures
The compatibility issue of admixtures and cement/admixtures has a long history. Over the years, the flexibility research study work on naphthalene-based high-efficiency water-reducing representatives and their substance items has achieved great outcomes:
Through the hard work of researchers, concrete preparers, admixture manufacturers, concrete and admixture manufacturers, concrete constructors and supervisors have actually collectively acknowledged this issue, transforming the scenario in which admixture makers and vendors have actually always thought all responsibilities.The conflict of admixtures and cement/admixtures is credited to many influencing aspects, and comprehensive research study has been accomplished on their influencing legislations. A series of effective services have actually been explored for the specific conflict in between admixtures and cement/admixtures.
Method 7: Purely control the resonance distance and vibration time
Considering that the slump of concrete prepared with polycarboxylic acid-based water-reducing representatives is usually big and the viscosity of the blend is reduced, the vibration radius and resonance time after the concrete blend is put need to be figured out through experiments or should be led by specialists. Expect the resonance distance is also tiny or the vibration time is as well long. Because instance, it is easy to cause architectural defects such as a serious reduction in concrete air web content and major stratification of the aggregate phase and paste stage.
Approach 8: Enhance preliminary upkeep and avoid splitting.
On any type of celebration, for any type of concrete mixture, preliminary and later upkeep after pouring is extremely essential.
Polycarboxylic acid water reducer has little effect on the shrinking performance of concrete; simply put, the addition of polycarboxylic acid water reducer does not excessively raise the contraction of concrete, which does not imply that the concrete with polycarboxylic acid water reducer can relax and even terminate the maintenance.
Like concrete with other admixtures, the second surface smearing, film covering or splashing of concrete with polycarboxylic acid water reducer after pouring and vibration is very efficient in preventing its plastic shrinking splits. Continual 7d or 14d moisturizing maintenance is not only required for the regular development of concrete strength but also a warranty to stop its drying shrinking cracks.
( foamed concrete)
In order to boost the fracture resistance of concrete with polycarboxylic acid, it is also needed to add a certain quantity of fiber, and this type of concrete still needs good damp treating to make certain that the framework does not break.
Method 9: Construction and administration units should function very closely with concrete prep work and admixture distributors
In the project, it is unpreventable to encounter numerous technological troubles, technical disputes and even conflicts and disagreements triggered by design crashes. The best goal of all celebrations associated with the project is to guarantee the smooth progression of the task and the high quality of the project. The background of polycarboxylic acid water reducers in manufacturing and application in real projects is really short, and the collected design experience can be far better. It is simple to come across application troubles and also result in engineering accidents currently, the building unit or administration device needs to work very closely with the concrete preparation, polycarboxylic acid water reducer manufacturing and supply, and cement/admixture production and supply from a technological point of view and carry out comprehensive analysis to recommend efficient options.
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