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Shandong Jufu Chemical Technology Co., Ltd., Bld. 4-405, No. 2177, Tianchen Road , Shandong, China, Jinan (2026)

15/06/2026

HPMC finds application across virtually all dry-mix material systems in construction, serving as a vital asset in various stages thanks to its stable and reliable performance.

In the realm of tile adhesives, HPMC plays a pivotal role in enhancing water retention and workability. If moisture is absorbed too rapidly by the wall or tile after application, incomplete cement hydration and reduced bond strength can occur, potentially leading to tile detachment later on. HPMC forms a uniform water film on the surface of the adhesive particles, locking in moisture and allowing the cement sufficient time to complete the hydration reaction, thereby significantly boosting bond strength. Additionally, it improves the thixotropic properties and slip resistance of the adhesive, preventing large-format tiles from sagging during installation and simplifying the application process.
In putty powder systems, HPMC primarily functions to retain water, increase viscosity, and improve application feel. Rapid moisture loss after application can cause peeling, cracking, and powdering, compromising the wall's smoothness and the quality of subsequent coating applications. HPMC’s water-retention capabilities ensure uniform moisture distribution as the putty dries, reducing the risk of cracking. Furthermore, it transforms the mixture into a smooth, fine paste upon mixing with water, offering lower resistance during application, higher efficiency, and a smoother, more refined finish.
In plastering mortars, HPMC serves multiple functions: water retention, thickening, and crack resistance. Whether for interior or exterior plastering, mortar water retention directly impacts construction quality. Insufficient water retention can lead to hollow spots and cracking during drying, impairing the wall's thermal insulation and impermeability. HPMC effectively locks moisture within the mortar, facilitating more complete cement hydration and enhancing both bond strength and crack resistance. It also improves mortar workability, ensuring a smoother plastering process and reducing surface defects. Beyond these uses, HPMC plays a significant role in self-leveling mortars, bonding mortars for thermal insulation systems, and gypsum-based products. In self-leveling mortar, it ensures material flowability and stability; in thermal insulation systems, it enhances the bond between adhesive mortar and insulation boards; and in gypsum products, it improves workability and water retention while reducing cracking. This broad compatibility has established HPMC as the recognized "all-round additive" in the dry-mix mortar industry.

08/06/2026

Types of Water-Reducing Agents:

By Appearance: Divided into aqueous solutions and powders. Aqueous solutions typically have a solids content of 10%, 20%, 40% (also known as mother liquor), and 50%, while powders generally have a solids content of 98%.

By Water-Reducing and Strengthening Capabilities: Divided into ordinary water-reducing agents (also known as plasticizers, with a water reduction rate of not less than 8%, represented by lignin sulfonates), high-efficiency water-reducing agents (also known as superplasticizers, with a water reduction rate of not less than 14%, including naphthalene-based, melamine-based, aminosulfonate-based, and aliphatic-based agents), and high-performance water-reducing agents (with a water reduction rate of not less than 25%, represented by polycarboxylate-based water-reducing agents), further subdivided into early-strength, standard, and re****ed types.

By Compositional Materials: Lignosulfonates, polycyclic aromatic salts, water-soluble resin sulfonates, naphthalene-based high-efficiency water-reducing agents, aliphatic high-efficiency water-reducing agents, amino high-efficiency water-reducing agents, polycarboxylate high-performance water-reducing agents, etc. Based on chemical composition, water-reducing agents can be categorized as follows: lignin sulfonate water-reducing agents, naphthalene-based high-efficiency water-reducing agents, melamine-based high-efficiency water-reducing agents, aminosulfonate-based high-efficiency water-reducing agents, fatty acid-based high-efficiency water-reducing agents, and polycarboxylate-based high-efficiency water-reducing agents.

01/06/2026

Precautions for Water-Reducing Agent Application

① Ensure compatibility with cement. This is fundamental to the use of water-reducing agents and must be taken seriously in terms of compatibility with cement. If the two are incompatible, the water-reducing effect will not only be ineffective, but it will also lead to reduced project quality and increased construction costs.

② Correctly select the water-reducing agent. To ensure the water-reducing agent functions effectively, it is essential to select the correct agent based on actual conditions. Different water-reducing agents should not be mixed to prevent adverse effects on concrete quality.

③ Pay attention to the quality of the water-reducing agent. There are many types of water-reducing agents, and their quality directly affects the quality of concrete. Therefore, when selecting a water-reducing agent, avoid using substandard ones during construction.

④ Control the dosage of the water-reducing agent. The dosage of the water-reducing agent directly affects the quality of concrete. Too little or too much water-reducing agent will not achieve the maximum effect and may even lead to engineering accidents. Therefore, the dosage of the water-reducing agent must be strictly controlled during use.

25/05/2026

There are several reasons for slump loss, mainly including the following:

1. Raw Material Influence: The compatibility and suitability of the cement and pumping agent used must be determined through compatibility testing. The optimal dosage of the pumping agent must be determined through compatibility testing with the cementitious materials. The amount of air-entraining and retarding components in the pumping agent has a significant impact on concrete slump loss; higher levels of these components result in slower slump loss, while lower levels lead to faster loss. Concrete prepared with naphthalene-based high-efficiency water-reducing agents experiences rapid slump loss, but the loss is slower below +5°C.

2. Mixing Process Influence: The concrete mixing process also affects concrete slump loss. The type and efficiency of the mixer are relevant; therefore, regular maintenance of the mixer and periodic replacement of the mixing blades are required. The concrete mixing time should not be less than 30 seconds; if it is less than 30 seconds, the concrete slump is unstable, resulting in a relatively faster slump loss.

3. Temperature Influence: Special attention should be paid to the impact of concrete slump loss. In hot summer months, when temperatures exceed 25°C or 30°C, the slump loss of concrete accelerates by more than 50% compared to that at 20°C. Conversely, when temperatures fall below +5°C, the slump loss is minimal or negligible. Therefore, the impact of temperature on concrete slump must be closely monitored during pumped concrete production and construction.

18/05/2026

The issue of compounding polycarboxylate superplasticizers: Polycarboxylate superplasticizers cannot be compounded with naphthalene-based superplasticizers. If both superplasticizers are used in the same equipment, incomplete cleaning can also cause interference. Therefore, it is now generally recommended that polycarboxylate superplasticizers be used in a separate equipment. Based on current usage, air-entraining agents and polycarboxylate salts show good compatibility, largely because the low dosage of the air-entraining agent allows it to "dissolve" in the polycarboxylate superplasticizer, enabling further compatibility and complementarity. Sodium gluconate in retarders also shows good compatibility, but poor compatibility with other inorganic salt admixtures, making compounding difficult.

11/05/2026

Applications of Sodium Lignosulfonate:

1. Dye Industry: Sodium lignosulfonate is used in large quantities and has high requirements in the dye industry. It is mainly used in the production of disperse dyes, vat dyes, and reactive dyes.

Specific Functions: It acts as a dispersion medium during dye grinding, helping to refine particles to the micron level, preventing fine particles from re-aggregating during drying or storage, improving the heat resistance stability of dyes, avoiding color spots during high-temperature dyeing, and improving the uniformity of dye dispersion in the dye bath.

2. Concrete Admixture: Sodium lignosulfonate is a common water-reducing agent.

Performance Characteristics:
Water Reduction Rate: 8%～12%
Air Content: ≤3%
Setting Time Difference: Initial setting extension 60～120 minutes
Compressive Strength Ratio: 3d≥110%, 7d≥110%, 28d≥100%
No Corrosion to Reinforcing Steel
Usage Recommendations:
Recommended dosage: 0.2%～0.3% of the cementitious material mass.
It can improve slump retention when combined with high-efficiency water-reducing agents.
Adaptability varies greatly among different cements; it is recommended to conduct a cement paste fluidity test.

27/04/2026

Improvement measures for the poor compatibility between cement and polycarboxylate admixtures:
① Improve cement production technology to produce low-heat cement, low-alkali cement, fine-gradation cement, and high-durability concrete cement compatible with polycarboxylate.

② Strengthen cooperation and communication among cement researchers, laboratory personnel, admixture supplier technical service personnel, and field testing personnel in practice to gradually explore the intrinsic factors of the compatibility between polycarboxylate and cement, and continuously develop cement production technology and improve admixture synthesis technology.

20/04/2026

How to compound concrete admixtures?

1. When preparing admixtures, it is essential to fully consider their compatibility with various raw materials, and pay attention to the interactions between different components and the order in which solids dissolve.
2. Different cements and admixtures, as well as other components in the admixture, have a significant impact on the performance of water-reducing agents. For example, when naphthalene-based water-reducing agents are used together with sodium gluconate, the water reduction rate is significantly improved. Organic and inorganic admixtures should be rationally combined.
3. Different cements and admixtures, as well as different mix proportions, will affect the retarding effect.
4. The air-entraining effect of air-entraining agents is affected by many factors, such as cement fineness, aggregate size, sand mud content, temperature, and mix proportion. When adding fly ash, there are more fine materials, smaller aggregate size, larger slump, and lower temperature, resulting in higher air content in the concrete.

13/04/2026

How do water-reducing agent technicians adjust the state of concrete?

When preparing concrete mixes at a batching plant, it's crucial to ensure both the workability and strength of the concrete. To achieve this, the first batch of concrete at the batching plant should be tested in multiple batches. The initial test assesses the workability of the concrete mix. Based on the results, the material usage for the second batch is estimated. After each test, further adjustments to the mix proportions are determined based on the results, until the concrete test results meet the construction requirements. During adjustments, at least the following four factors must be considered: 1) the extended transport time due to distance; 2) the construction process, whether to use a pump truck or crane for delivery; 3) the pouring location, the density of reinforcing steel and corrugated pipes; and 4) the construction environment, such as varying temperatures and weather conditions. Based on the results of the concrete mix trials, the final construction mix proportions are determined.

07/04/2026

Reducing air bubbles on the concrete surface is a comprehensive task that cannot be achieved by one or two methods alone. The following are some commonly used methods and points to note in actual construction:

⑴ Appropriately extend the concrete placement time.

⑵ Adjustment of polycarboxylate superplasticizer. Polycarboxylate superplasticizer manufacturers should not add air-entraining agents during production; if necessary, an appropriate amount of defoamer can be added.

⑶ Improve construction techniques. Improving construction techniques is particularly important for reducing concrete air bubbles.

⑷ Select good release agents and formwork. Practice has shown that selecting good release agents is very effective in eliminating air bubbles on the concrete surface.

Shandong Jufu Chemical Technology Co., Ltd.

15/06/2026

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