Technique 1: Enhance technological level, support item quality, and enhance technological books:
According to the study, just a few makers of polycarboxylic acid water reducer products in my country are individually created, and a lot of various other manufacturers present modern technology from college research institutions or research institutes or straight introduce technology from other business to start manufacturing. Because of the minimal technical stamina of the suppliers themselves, they do not have a deep understanding of the polycarboxylic acid water reducer modern technology they produce, and it is difficult to adjust to various modifications in resources and procedures, and there is no chance to discuss the stability of product high quality. Consequently, it is suggested that polycarboxylic acid water-reducing agent producers actively cooperate with colleges and research institutes to completely understand the different aspects influencing the efficiency of polycarboxylic acid water-reducing representative products, change the synthesis procedure criteria in a prompt fashion to support item high quality, and strengthen technological reserves with joint or independent r & d to adjust to market need. In addition, the early release of polycarboxylic acid water-reducing agent resources requirements and the security of polycarboxylic acid water-reducing representative basic material costs are also very crucial to make certain the security of polycarboxylic acid water-reducing agent item performance.
Technique 2: Belief in test results rather than product specifications
Some items that are remarkable in the water-reducing agent specs, or even products with outstanding test outcomes, may not be suitable for a particular task. On the contrary, some items may satisfy the needs of concrete material prep work for a particular job despite the fact that the test outcomes are not really outstanding. In addition, due to modifications in basic materials, the test results throughout job bidding process can not represent the real application of the task. GB50119-2003 “Technical Specs for Application of Concrete Admixtures” “2.1.4” plainly specifies: The raw materials made use of in concrete with admixtures, such as concrete, sand, stone, admixtures, and admixtures, shall adhere to the arrangements of the appropriate national standards in force; when trial-mixing concrete with admixtures, the raw products used in the task shall be made use of, and the examination things will be determined according to the layout and building and construction demands. The test conditions shall coincide as the construction problems. When the raw materials used in the task or the concrete performance demands alter, the trial-mixing examination will be conducted again.
(Cabr superliasticizer)
Method 3: Stay clear of get in touch with in between polycarboxylic acid water reducers and iron products
For polycarboxylic acid water reducer manufacturers and suppliers, special manufacturing devices and production lines will be made use of to synthesize and worsen polycarboxylic acid water reducers, and polycarboxylic acid water reducers shall not be manufactured or worsened making use of the very same assembly line as various other water reducers. On top of that, the transport and storage of polycarboxylic acid water reducers will not utilize iron materials (except stainless steel) but plastic, glass and other products. Contact with iron in some cases triggers modifications in the efficiency of polycarboxylic acid water reducers.
Method 4: Resolutely prevent mixing various other sorts of admixtures
It is strictly forbidden to blend other water reducers or various other sorts of admixtures. There are 2 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 distributors. The user of the water reducer, that is, the concrete preparer, only needs to check and keep its relevant efficiency. Nothing else elements may be worsened in it, nor may other components be mixed in it due to carelessness. It is absolutely restricted to utilize pumps and metering devices for pumping and metering various other admixtures without cleansing. An additional meaning is that concrete mixing equipment, transportation lorries, and pumping devices are best made use of for concrete blended with polycarboxylic acid water reducers. When sharing blending devices, transportation vehicles and pumping devices, these tools needs to be extensively cleaned prior to they can be utilized for concrete blended with other types of admixtures, and the other way around.
Technique 5: Purely gauge the water reducer and mix water
When preparing concrete blends with polycarboxylic acid water reducers, the optimal water reducer dose and water consumption identified by the laboratory must be purely determined. Do not enhance the water reducer dose or water intake at will to stay clear of negative sensations such as segregation, blood loss, hardening, and enhanced air web content in the mixed concrete, which will certainly influence the normal pumping building and pouring top quality of the concrete.
The moisture had in the raw materials sand and stone aggregates need to be precisely measured and subtracted from the overall water usage to prevent unfavorable effects triggered by inaccurate detection of the wetness included in the sand and rock accumulations.
( concrete addtives)
Technique 6: Appropriately deal with the compatibility trouble 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 service naphthalene-based high-efficiency water-reducing representatives and their substance items has achieved excellent results:
Through the hard work of scientists, concrete preparers, admixture manufacturers, cement and admixture manufacturers, concrete manufacturers and supervisors have actually jointly recognized this issue, changing the scenario in which admixture suppliers and distributors have constantly assumed all responsibilities.The incompatibility of admixtures and cement/admixtures is attributed to many influencing factors, and in-depth study has been accomplished on their influencing regulations. A collection of efficient services have been explored for the specific incompatibility between admixtures and cement/admixtures.
Approach 7: Strictly control the vibration distance and vibration time
Considering that the depression of concrete prepared with polycarboxylic acid-based water-reducing agents is normally big and the thickness of the mix is reduced, the vibration radius and resonance time after the concrete mix is put need to be established with experiments or must be led by experts. Expect the vibration distance is also tiny or the resonance time is also long. Because situation, it is easy to trigger structural issues such as a significant reduction in concrete air material and severe stratification of the accumulated stage and paste stage.
Method 8: Strengthen first upkeep and stop cracking.
On any type of occasion, for any concrete mix, preliminary and later maintenance after pouring is very essential.
Polycarboxylic acid water reducer has little result on the shrinkage performance of concrete; in other words, the enhancement of polycarboxylic acid water reducer does not exceedingly raise the shrinking of concrete, which does not imply that the concrete with polycarboxylic acid water reducer can kick back or even terminate the maintenance.
Like concrete with various other admixtures, the second surface denigration, film covering or splashing of concrete with polycarboxylic acid water reducer after pouring and vibration is extremely effective in avoiding its plastic shrinking splits. Continuous 7d or 14d hydrating upkeep is not only required for the regular growth of concrete stamina yet also a guarantee to prevent its drying shrinkage splits.
( foamed concrete)
In order to improve the crack resistance of concrete with polycarboxylic acid, it is also necessary to include a certain amount of fiber, and this type of concrete still requires excellent wet treating to ensure that the structure does not fracture.
Approach 9: Construction and monitoring systems should work very closely with concrete preparation and admixture distributors
In the project, it is unavoidable to come across various technical troubles, technological conflicts and also disputes and conflicts triggered by design mishaps. The ultimate goal of all events involved in the job is to make certain the smooth progression of the task and the quality of the project. The history of polycarboxylic acid water reducers in production and application in real jobs is really brief, and the built up engineering experience might be much better. It is simple to run into application troubles and even result in design mishaps at this time, the construction unit or management unit requires to work carefully with the concrete prep work, polycarboxylic acid water reducer production and supply, and cement/admixture production and supply from a technological point of view and conduct extensive analysis to suggest reliable solutions.
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