Technique 1: Boost technological level, maintain product high quality, and reinforce technological reserves:
According to the study, just a couple of producers of polycarboxylic acid water reducer products in my country are independently developed, and most various other suppliers introduce innovation from college research institutions or study institutes or straight present modern technology from various other firms to begin production. Due to the minimal technological toughness of the producers themselves, they do not have a deep understanding of the polycarboxylic acid water reducer technology they create, and it is challenging to adapt to various changes in raw materials and processes, and there is no chance to talk about the stability of product high quality. Consequently, it is recommended that polycarboxylic acid water-reducing agent makers proactively cooperate with colleges and research study institutes to fully understand the numerous aspects affecting the performance of polycarboxylic acid water-reducing agent items, change the synthesis procedure criteria in a prompt way to support item quality, and enhance technical reserves via joint or independent r & d to adapt to market need. In addition, the early launch of polycarboxylic acid water-reducing agent raw material standards and the security of polycarboxylic acid water-reducing agent raw material costs are likewise very crucial to ensure the security of polycarboxylic acid water-reducing agent product performance.
Approach 2: Idea in test results rather than product requirements
Some products that are amazing in the water-reducing representative requirements, or even items with outstanding examination results, might not be suitable for a certain task. On the other hand, some items may meet the requirements of concrete product preparation for a certain task even though the test results are not extremely superior. On top of that, because of changes in resources, the examination results throughout task bidding can not represent the actual execution of the task. GB50119-2003 “Technical Specs for Application of Concrete Admixtures” “2.1.4” plainly stipulates: The raw materials used in concrete with admixtures, such as cement, sand, rock, admixtures, and admixtures, will comply with the stipulations of the pertinent nationwide requirements effective; when trial-mixing concrete with admixtures, the raw materials used in the job shall be made use of, and the examination things shall be established according to the design and building and construction demands. The examination conditions shall coincide as the construction conditions. When the raw materials used in the job or the concrete efficiency needs change, the trial-mixing examination shall be carried out once more.
(Cabr superliasticizer)
Approach 3: Stay clear of call between polycarboxylic acid water reducers and iron products
For polycarboxylic acid water reducer manufacturers and distributors, unique production devices and production lines shall be used to synthesize and compound polycarboxylic acid water reducers, and polycarboxylic acid water reducers will not be synthesized or intensified making use of the same production line as other water reducers. In addition, the transport and storage of polycarboxylic acid water reducers will not use iron products (except stainless steel) but plastic, glass and other products. Call with iron in some cases triggers changes in the performance of polycarboxylic acid water reducers.
Technique 4: Resolutely avoid mixing various other sorts of admixtures
It is strictly prohibited to mix other water reducers or various other kinds of admixtures. There are two significances. First, the compounding of polycarboxylic acid water reducers (such as with lignin sulfonate, air entrainment, defoaming, slowing down and various other parts) can just be performed by admixture suppliers or suppliers. The user of the water reducer, that is, the concrete preparer, only requires to examine and keep its appropriate efficiency. Nothing else components might be intensified in it, nor may other elements be mixed in it as a result of neglect. It is definitely prohibited to make use of pumps and metering tools for pumping and metering other admixtures without cleaning. One more definition is that concrete mixing tools, transport lorries, and pumping devices are best made use of for concrete mixed with polycarboxylic acid water reducers. When sharing mixing equipment, transport vehicles and pumping tools, these devices has to be thoroughly cleaned up prior to they can be made use of for concrete mixed with various other types 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 dose and water usage determined by the laboratory needs to be purely determined. Do not enhance the water reducer dose or water intake at will to avoid negative sensations such as partition, bleeding, setting, and boosted air material in the blended concrete, which will affect the typical pumping construction and putting quality of the concrete.
The wetness included in the raw materials sand and stone accumulations should be precisely determined and deducted from the complete water consumption to stop adverse consequences triggered by unreliable detection of the dampness consisted of in the sand and stone accumulations.
( concrete addtives)
Method 6: Appropriately face the compatibility problem of polycarboxylic acid water reducers and cement/admixtures
The compatibility trouble of admixtures and cement/admixtures has a lengthy history. Throughout the years, the flexibility research work on naphthalene-based high-efficiency water-reducing representatives and their substance products has actually attained good outcomes:
With the effort of researchers, concrete preparers, admixture producers, concrete and admixture makers, concrete erectors and supervisors have jointly identified this issue, transforming the situation in which admixture producers and vendors have actually always assumed all responsibilities.The conflict of admixtures and cement/admixtures is attributed to several influencing factors, and comprehensive study has actually been accomplished on their influencing legislations. A series of efficient services have actually been discovered for the specific incompatibility in between admixtures and cement/admixtures.
Method 7: Purely manage the vibration distance and vibration time
Given that the depression of concrete prepared with polycarboxylic acid-based water-reducing agents is normally huge and the viscosity of the blend is low, the vibration span and vibration time after the concrete mixture is put should be identified via experiments or need to be directed by experts. Suppose the vibration distance is too little or the vibration time is as well long. Because case, it is easy to cause structural defects such as a significant reduction in concrete air content and major stratification of the accumulated phase and paste phase.
Method 8: Strengthen initial maintenance and avoid cracking.
On any type of event, for any kind of concrete blend, initial and later maintenance after pouring is extremely essential.
Polycarboxylic acid water reducer has little result on the shrinkage performance of concrete; simply put, the addition of polycarboxylic acid water reducer does not excessively increase the contraction of concrete, which does not indicate that the concrete with polycarboxylic acid water reducer can unwind and even cancel the upkeep.
Like concrete with various other admixtures, the secondary surface area smearing, film covering or splashing of concrete with polycarboxylic acid water reducer after putting and resonance is really reliable in preventing its plastic contraction fractures. Continual 7d or 14d hydrating upkeep is not only required for the normal development of concrete strength but also a guarantee to stop its drying out shrinkage fractures.
( foamed concrete)
In order to boost the split resistance of concrete with polycarboxylic acid, it is additionally required to add a particular amount of fiber, and this type of concrete still needs excellent damp curing to ensure that the structure does not break.
Approach 9: Building and construction and monitoring systems must function very closely with concrete preparation and admixture vendors
In the job, it is unavoidable to run into numerous technical troubles, technological conflicts and also conflicts and conflicts brought on by engineering accidents. The ultimate goal of all parties associated with the job is to make sure the smooth development of the project and the top quality of the job. The history of polycarboxylic acid water reducers in production and application in actual jobs is very short, and the accumulated design experience can be much better. It is simple to encounter application problems and even result in design mishaps at this time, the construction unit or management system needs to function very closely with the concrete preparation, polycarboxylic acid water reducer production and supply, and cement/admixture manufacturing and supply from a technological point of view and perform thorough evaluation to propose reliable solutions.
Vendor
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