Method 1: Improve technical degree, maintain product high quality, and reinforce technological books:
According to the study, just a couple of suppliers of polycarboxylic acid water reducer items in my country are individually established, and many other producers introduce modern technology from college study organizations or research institutes or straight present innovation from various other business to begin manufacturing. As a result of the restricted technical stamina of the suppliers themselves, they do not have a deep understanding of the polycarboxylic acid water reducer innovation they generate, and it is challenging to adjust to numerous changes in basic materials and processes, and there is no chance to talk about the stability of item high quality. As a result, it is suggested that polycarboxylic acid water-reducing representative producers proactively cooperate with colleges and research institutes to totally recognize the numerous aspects influencing the efficiency of polycarboxylic acid water-reducing agent products, adjust the synthesis procedure specifications in a timely fashion to support item top quality, and reinforce technological reserves through joint or independent r & d to adapt to market demand. In addition, the early release of polycarboxylic acid water-reducing representative resources requirements and the stability of polycarboxylic acid water-reducing agent raw material rates are also extremely important to make certain the security of polycarboxylic acid water-reducing agent product efficiency.
Technique 2: Belief in test results as opposed to product specifications
Some items that are remarkable in the water-reducing agent specs, or even items with excellent examination outcomes, may not be suitable for a details project. However, some items may fulfill the demands of concrete product preparation for a particular project even though the examination results are not very impressive. On top of that, due to adjustments in resources, the examination results throughout project bidding can not stand for the actual implementation of the job. GB50119-2003 “Technical Specifications for Application of Concrete Admixtures” “2.1.4” clearly stipulates: The raw materials utilized in concrete with admixtures, such as concrete, sand, rock, admixtures, and admixtures, shall abide by the provisions of the appropriate 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 products will be determined according to the layout and building needs. The test conditions will be the same as the building and construction problems. When the raw materials utilized in the job or the concrete performance needs change, the trial-mixing test shall be carried out once more.
(Cabr superliasticizer)
Method 3: Prevent contact between polycarboxylic acid water reducers and iron materials
For polycarboxylic acid water reducer producers and vendors, unique manufacturing devices and production lines will be utilized to manufacture and intensify polycarboxylic acid water reducers, and polycarboxylic acid water reducers will not be manufactured or compounded utilizing the same production line as various other water reducers. On top of that, the transportation and storage space of polycarboxylic acid water reducers will not utilize iron products (other than stainless-steel) yet plastic, glass and various other materials. Call with iron in some cases causes changes in the efficiency of polycarboxylic acid water reducers.
Technique 4: Resolutely stay clear of blending various other sorts of admixtures
It is strictly forbidden to mix other water reducers or other sorts of admixtures. There are two meanings. First, the compounding of polycarboxylic acid water reducers (such as with lignin sulfonate, air entrainment, defoaming, retarding and various other elements) can just be carried out by admixture producers or vendors. The user of the water reducer, that is, the concrete preparer, just requires to evaluate and store its pertinent performance. No other components may be intensified in it, neither might various other parts be blended in it due to neglect. It is absolutely prohibited to use pumps and metering tools for pumping and metering other admixtures without cleaning. An additional definition is that concrete mixing devices, transportation lorries, and pumping tools are best made use of for concrete combined with polycarboxylic acid water reducers. When sharing mixing equipment, transportation automobiles and pumping tools, these equipment must be extensively cleaned before they can be utilized for concrete blended with various other types of admixtures, and the other way around.
Method 5: Strictly gauge the water reducer and mix water
When preparing concrete blends with polycarboxylic acid water reducers, the ideal water reducer dose and water intake identified by the laboratory ought to be strictly measured. Do not boost the water reducer dose or water intake at will certainly to avoid adverse phenomena such as partition, blood loss, setting, and increased air web content in the mixed concrete, which will certainly affect the typical pumping building and construction and pouring quality of the concrete.
The wetness contained in the raw products sand and stone aggregates must be properly measured and deducted from the overall water intake to avoid negative repercussions triggered by inaccurate discovery of the wetness included in the sand and stone aggregates.
( concrete addtives)
Approach 6: Appropriately deal with 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 work on naphthalene-based high-efficiency water-reducing agents and their substance items has attained great outcomes:
With the effort of scientists, concrete preparers, admixture suppliers, cement and admixture manufacturers, concrete producers and supervisors have actually jointly recognized this problem, altering the situation in which admixture manufacturers and providers have actually always assumed all responsibilities.The conflict of admixtures and cement/admixtures is credited to lots of influencing factors, and comprehensive research study has been carried out on their influencing regulations. A collection of efficient services have been explored for the specific incompatibility in between admixtures and cement/admixtures.
Method 7: Strictly control the vibration distance and resonance time
Considering that the downturn of concrete prepared with polycarboxylic acid-based water-reducing agents is usually large and the viscosity of the mixture is low, the vibration distance and resonance time after the concrete combination is put must be figured out via experiments or must be directed by experts. Suppose the vibration radius is as well tiny or the resonance time is as well long. Because situation, it is very easy to create architectural defects such as a severe reduction in concrete air material and severe stratification of the accumulated phase and paste stage.
Method 8: Strengthen first maintenance and stop fracturing.
On any type of occasion, for any concrete blend, first and later upkeep after pouring is extremely vital.
Polycarboxylic acid water reducer has little effect on the shrinkage efficiency of concrete; in other words, the addition of polycarboxylic acid water reducer does not exceedingly boost the shrinkage 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 denigration, movie covering or splashing of concrete with polycarboxylic acid water reducer after putting and vibration is very effective in stopping its plastic contraction splits. Continual 7d or 14d hydrating upkeep is not only necessary for the normal development of concrete toughness however additionally a guarantee to avoid its drying contraction cracks.
( foamed concrete)
In order to improve the fracture resistance of concrete with polycarboxylic acid, it is also essential to include a specific amount of fiber, and this type of concrete still needs great wet treating to guarantee that the framework does not crack.
Technique 9: Construction and administration devices ought to function very closely with concrete prep work and admixture vendors
In the task, it is inescapable to experience different technical problems, technical disagreements and even problems and disagreements brought on by engineering mishaps. The ultimate goal of all events involved in the task is to ensure the smooth progress of the project and the high quality of the task. The background of polycarboxylic acid water reducers in production and application in actual jobs is very brief, and the gathered design experience can be much better. It is very easy to experience application troubles and also lead to engineering mishaps right now, the construction unit or administration unit requires to work carefully with the concrete preparation, polycarboxylic acid water reducer production and supply, and cement/admixture production and supply from a technological perspective and conduct comprehensive analysis to recommend efficient options.
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