Ducon Construction Chemicals Industries Ltd leads in manufacturing and supplying concrete admixtures. We offer a range of products, including integral waterproofing compounds, water-reducing and plasticizing admixtures, high-range water-reducing and high-range water-retarding superplasticizers, polycarboxylic concrete admixtures, and concrete hyperplasticizers. Get these items at the best prices from Bangladesh and Malaysia.
নতুন বাড়ী বানাচ্ছেন? দীর্ঘস্থায়ী ড্যাম্প মুক্ত বাড়ী চান?
সিমেন্টের সাথে ডিউনমিক্স ৭০০ মেশাতে ভুলবেন না।
Making new home? Want durable damp proof home?
Do not forget to mix Duconmix 700 with cement.
Ducon Construction Chemicals is a company of Leading Concrete Admixture in Bangladesh, Manufacturer and Best Price Suppliers Company in Bangladesh, Malaysia and Many Others Countries.
Ducon Concrete Admixtures
Concrete admixtures are either natural or manufactured chemicals that people add to concrete before or during mixing. Ducon Construction Chemicals, for instance, produces a diverse range of concrete admixtures in Bangladesh to address specific needs. Common types of admixtures include air-entraining agents, water reducers, retarders, and accelerators.
To use these admixtures successfully, you must follow proper batching and concreting methods. Typically, most admixtures come as ready-to-use liquids, which you can add to the concrete either at the plant or the job site. Additionally, the effectiveness of a waterproofing admixture in Bangladesh relies on several factors, such as the type and quantity of cement, water content, mixing time, slump, and concrete temperature.
Furthermore, in some situations, you can achieve similar effects to those of admixtures by adjusting the concrete mixture itself. This approach includes reducing the water-cement ratio, using different types of cement, or modifying the aggregate and its gradation.
ASTM Categories – Concrete Admixtures
ASTM C494 specifies the requirements for seven chemical admixture types. They are:
- Type A: Water-reducing admixtures
- Type B: Retarding admixtures
- Type C: Accelerating admixtures
- Type D: Water-reducing and retarding admixtures
- Type E: Water-reducing and accelerating admixtures
- Type F: Water-reducing, high range admixtures
- Type G: Water-reducing, high range, and retarding admixtures
Ducon Water Reducing Admixtures
Ducon water-reducing admixtures effectively lower the amount of water needed in a concrete mix. While water does enhance the workability of concrete, excess water can compromise its strength and durability. Therefore, Ducon water-reducing admixtures, also known as plasticizers, play a crucial role in improving workability and increasing the overall strength of the concrete. In addition, they enhance the bond with steel and prevent common issues such as cracking, segregation, honeycombing, and bleeding.
Moreover, we offer three distinct types of plasticizers: normal, mid-range, and super. Normal plasticizers reduce water content by up to 10%, mid-range by up to 15%, and super plasticizers by up to 30%. Furthermore, the common ingredients in plasticizers include calcium, sodium, and ammonium lignosulphonates. On the other hand, newer superplasticizers often use advanced materials like acrylic polymers, polycarboxylates, or multicarboxylate ethers, offering even greater efficiency and performance.
Ducon Water Reducing Admixtures
Ducon Retarding Admixtures
Ducon retarding admixtures effectively slow down the hydration rate of cement in its initial stage, thereby extending the initial setting time of concrete. Known as retarders, these admixtures are particularly beneficial in high-temperature zones where concrete tends to set rapidly. As a result, they help prevent issues such as discontinuities in the structure, poor bonding between surfaces, and unwanted voids in the concrete. Furthermore, retarders play a crucial role in mitigating these problems. Commonly used retarders include calcium sulfate, gypsum, starch, cellulose products, common sugar, and acid salts. Additionally, many water-reducing admixtures also function as retarding admixtures, often referred to as retarding plasticizers. Ducon retarding admixtures, in particular, stand out as the leading choice in Bangladesh.
Ducon Retarding Admixtures
Ducon Accelerating Admixtures
Ducon accelerating admixtures effectively reduce the initial setting time of concrete, speeding up the hardening process, which is why they are commonly known as accelerators. Consequently, these admixtures also enhance the early-stage strength of concrete by increasing the rate of hydration. This faster hardening process proves particularly useful in various situations. For example, it allows for early formwork removal, shorter curing periods, and efficient emergency repairs. Additionally, it is especially beneficial for construction in low-temperature regions where time is a critical factor. Common accelerating admixtures include triethanolamine, calcium formate, silica fume, calcium chloride, and finely divided silica gel. Among these, calcium chloride stands out as the most affordable and frequently used accelerating admixture.
Ducon Accelerating Admixtures
Ducon Accelerating Admixtures
Ducon Air entraining admixtures have revolutionized concrete technology by introducing porosity as a key feature. As a result, these admixtures primarily enhance the durability of concrete, especially under freezing and thawing conditions. When you add them to a concrete mix, they generate millions of non-coalescing air bubbles throughout the mix, which significantly improves its properties. Furthermore, air entrainment not only boosts the workability of concrete but also prevents segregation and bleeding. In addition, it reduces the unit weight and modulus of elasticity while increasing the chemical resistance of the concrete. Moreover, it allows for a reduction in the amount of cement, sand, or water needed in the mix. Commonly used air-entraining admixtures include vinsol resin, darex, Teepol, and Cheecol. These admixtures are typically made from natural wood resins, alkali salts, and animal and vegetable fats and oils.
Ducon Pozzolanic Admixtures
Ducon Pozzolanic admixtures create dense concrete mixes that are particularly ideal for water-retaining structures such as dams and reservoirs. Moreover, these admixtures effectively reduce the heat of hydration while also minimizing thermal shrinkage.
Benefits of Pozzolanic Materials
Furthermore, using the right quantity of pozzolanic materials not only optimizes concrete performance but also significantly reduces risks like alkali-aggregate reaction, leaching, and sulfate attack. Both natural and artificial pozzolanic materials play a crucial role in this process. For instance, natural pozzolans include clay, shale, volcanic tuffs, and pumicite, while artificial pozzolans like fly ash, silica fume, blast furnace slag, rice husk ash, and surkhi are commonly used. Additionally, pozzolans react with the calcium hydroxide produced during cement hydration, thereby forming additional cementitious compounds.
Importance of Calcium Hydroxide
Calcium hydroxide, or lime, makes up to 25% of hydrated Portland cement. However, it does not contribute to the strength or durability of concrete. Consequently, when pozzolans combine with lime, they produce additional calcium silicate hydrate, the material responsible for binding concrete together. As a result, this process not only enhances the concrete’s overall strength and durability but also effectively consumes the excess lime, thereby improving the quality of the concrete.
Key Points
- The strength of the concrete is increased
- Its density is increased
- Efflorescence is decreased
- The propensity for alkali-silica reaction (reaction with glass) is decreased, or even virtually eliminated
Ducon Concrete Plasticizer
Ducon Concrete Plasticizer, also known as a water-reducing agent or superplasticizer, significantly enhances the fluidity and processability of concrete before it solidifies, which in turn facilitates construction. Generally, Ducon concrete plasticizers find widespread use in the concrete and construction industries.
Moreover, our plasticizer concrete admixture effectively reduces water content without compromising the workability of the concrete. As a result, this reduction in water content leads to increased strength in the concrete. Additionally, when volcanic ash is incorporated into the concrete, we include a concrete plasticizer to further boost its strength. This approach is especially advantageous for producing high-strength or fiber-reinforced concrete, as it consistently helps achieve the desired strength levels.
Ducon Super Plasticizing Admixtures
Ducon Construction Chemicals Industries Ltd is recognized as a pioneering manufacturer and exporter, and we are currently offering a superior range of Super Plasticizer Admixtures in Bangladesh. Specifically, this admixture reduces the water content in the concrete mix while also slowing down the setting rate. In addition, it enhances the hardness of the concrete, thus improving its overall quality.
To ensure top-notch quality, we use only the highest quality compounds and employ modern technology in processing our Super Plasticizer Admixture. Moreover, we adhere to international market standards to guarantee excellence. Furthermore, we package our waterproofing admixture in plastic cans, which effectively protect it from moisture and contamination, ensuring its optimal performance.
