Polycarboxylate Superplasticizer powder is used as a water reducer
for concrete
In recent years, with the continuous increase of the infrastructure
construction, industrial and civil building scale in our country,
internally continue to increase infrastructure construction, and
actively participating in foreign key projects and the output of
high speed iron technology, can not be avoided from the improvement
of high performance concrete technology, and the development of
high performance concrete technology puts forward higher and more
diverse requirements to the concrete admixture.
Polycarboxylic acid water reduction due to its unique structural
characteristics, with high water reduction rate, low content,
excellent slump protection performance, green environmental
protection and molecular structure designability and other
advantages, has been widely used in high-speed rail, subway,
Bridges, DAMS and other large infrastructure projects, is currently
domestic and foreign water reducing agent market leading products.
It is the core product to promote the continuous development of
high performance concrete technology and construction technology.
However, a large number of engineering practices have proved that
due to the continuous reduction of high-quality sand and stone
resources, as well as the high temperature conditions and long
distance transportation process, the slump of concrete often
appears to lose too fast, so that the working performance of
concrete is reduced, it can not be poured normally, and even the
phenomenon of adding water at the construction site, which
seriously affects the mechanical properties and durability of
concrete. At present, in practical application, the concrete slump
loss is usually inhibited by compounding retardants such as sodium
gluconate, white sugar and citric acid. However, the addition of
these retardants cannot completely solve the problem of too fast
slump loss of concrete. Moreover, if the addition of retardants is
not well controlled, May lead to concrete segregation, delayed
bleeding, setting time is too long, early strength is low new
problems.
Due to the designability of its molecular structure, polycarboxylic
acid superplasticizer can be prepared with different functional
types of polycarboxylic acid superplasticizer products through the
combination of different structural units and functional energy
groups. Using isoenol polyoxyethylene, acrylic acid, hydroxyethyl
acrylate, hydroxypropyl acrylate and methyl allyl tartrate mono as
raw materials, aqueous solution free radical polymerization, and by
adjusting the polymerization temperature, the amount of chain
transfer agent, the use of hydroxyethyl acrylate and hydroxypropyl
acrylate and methyl allyl tartrate mono and other factors, A high
slump - preserving polycarboxylic acid water reducer was
synthesized.
| NO | Index items | Test Results |
| 1 | Appearance | white powder |
| 2 | stacking density/g·cm-³ | 0.72 |
| 3 | content of cl- (%) | 0.023 |
| 4 | PH value | 6.5 |
| 5 | water contene(%) | 0.85 |
| 6 | alkcli content (%) | 2.17 |
| 7 | Na2SO4 content(%) | 1.25 |
Product characteristics:
1. High water reduction rate: it has excellent water reduction rate
and plastic retention, and still has excellent water reduction
performance under low content. The effect is particularly
significant in cement-based mortar, gypsum based mortar and high
grade concrete, and the highest water reduction rate can reach 40%;
High water reduction rate: in low content has a very high water
reduction efficiency, giving the material system excellent
liquidity, effectively improve the system of compactness and
strength, the highest water reduction rate can reach 40%.
2. High dispersion: With excellent dispersion ability, it can
quickly adsorb, reduce mixing time, give the material system
excellent workability and constructability, improve construction
efficiency and meet different construction requirements.
3. High adaptability: with a variety of cement-based systems have
excellent adaptability, and good compatibility with other
functional admixtures, under a variety of conditions do not reduce
the application performance.
4. Early strength and high strength: it has excellent early
strength and enhancement effect. The enhancement effect is
remarkable under the same conditions, and the dosage can also be
reduced under the same demand.
5. High durability: enhance the compactness of hardened slurry,
improve shrinkage and creep performance, reduce cracks, enhance
permeability, erosion and chloride penetration resistance, improve
durability.
6. Green environmental protection: does not contain harmful
substances, safe environmental protection, belongs to environmental
friendly materials.
FAQ:
Q1. Which payment is available for your company?
Re: T/T, L/C, D/A, D/P, Western Union, MoneyGram
Q2. How can I get the sample?
Re: We provide you free sample. But you should pay for the postage.
When we have a formal transaction, we will refund the postage of
this sample.
Q3. How can you guarantee the goods you offer is qualified?
Re: We can provide sample, COA, MSDS and etc to help you insure the
quality. And we promise every batch of product will be tested in
the factory, and they can only leave the factory after the quality
is qualified.
Q4. How can I get your best price?
Re: We will provide you timely market information and the
fluctuation trends of raw material to help you determine the most
appropriate time for an ord
