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Foam concrete is a kind of concrete with lightweight and has ideal strength. Because of the hollow structure in foam concrete, it has the function of absorbing heat and isolating sound. 

The density of foamed concrete is 300-1200 kg/m3, and the thermal conductivity is between 0.08-0.3W/ (m ·K). 

Foam concrete is widely used in CLC blocks, lightweight partition panels, roof insulation, floor cushion construction, floor heating backfilling, and other occasions. 

At the same time, foam concrete is also a good sound absorption material, which can be used in highway sound insulation boards, sound absorption boards, and other fields. 

Generally speaking, foam concrete is a kind of building material with multi-function, environmental protection, and economy, which has a wide application prospect.


  • What is Cellular lightweight concrete

    Cellular Light Weight Concrete (CLWC) is a relatively new material having cementitious properties, incorporated with mechanically entrained foam in the cement-based slurry or mortar, which can be manufactured in varying densities ranging from 300 kg/m³ to 1850 kg/m³. CLWC, a fairly new material as compared to conventional concrete, has become a more popular material in the construction industry. In this study, the cubes are cast for different target densities 800 to 1000 kg/m³, 1000 to 1200 kg/m³ and 1200 to 1400 kg/m³ by varying the fly ash content from 50% to 80% at the interval of 5% and a corresponding decrease in cement content 50% to 20%. The water content of all mixes is kept constant at 40% of the weight of cement and fly ash combined. The porosity of lightweight foamed concrete is higher for high density as the temperature increases from ambient to up to 600oc. In contrast, the changes in porosity for lower densities of lightweight foamed concrete are more moderate. The compressive strength of lightweight foamed concrete decreased with temperature. The material lost the absorbed water, free water, and chemically bound water; due to this lost water, micro-cracking developed, which resulted in a reduction in compressive strength. The loss of mechanical properties of lightweight foamed concrete, found at higher temperatures. Also, the results demonstrate the loss of stiffness at elevated temperature occurs predominantly after about 90oc, regardless of densities.


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    Evaluation of Properties of Cellular Light Weight Concrete

    Cellular lightweight concrete, as indicated by its name, the concrete having self-weight lighter than conventional concrete. This provides almost similar strength to normal strength concrete having lower grades. Lightweight concrete is defined as concrete having a density (air-dry) below 2000 kg/m³ as compared to normal concrete with a density in the region of 2350 kg/m³. The concept behind the manufacturing of the CLWC is to create a porous microstructure by entrapment of air bubbles in the concrete mix. This can be done by adding preformed foam or chemical surfactant, which reacts during the mixing to create air bubbles in the mix. The air bubbles continue their size and shape and remain stable for the period of the setting process. The diameter of air bubbles ranges from 0.1 and 1 mm. The “skin” of voids or bubbles must be able to withstand mixing, transportation, and compaction. These air bubbles give foamed concrete its lightweight property. As there is no coarse aggregate used in CLWC, the term concrete is strictly speaking inappropriate. Mechanical foaming can be done in two principal ways. The most commonly used foaming agents are based on protein hydrolyzed or synthetic surfactants. They are formulated to produce air bubbles that are more stable and able to resist the physical and chemical forces executed during mixing, placing, and hardening.

     

    The production of Lightweight Foam Concrete

    The foam produced from protein-based surfactants has a smaller size bubble and is more stable. Therefore, protein-based surfactants would be best suited for the production of Lightweight Foam Concrete of comparatively high density and high strength. The stability of foam depends on its density and the type of surfactant. The foam has to endure the pressure of the cement paste or mortar mix and the chemical environment of the concrete until the concrete gets set and strong enough to maintain the structure. The long-term compressive strength of foamed concrete, 28 days, and 1-year compressive strength is the function of dry density. Using the higher content of fly ash does not affect the long-term compressive strength of well-cured foamed concrete. Higher portions of fly ash in the foamed concrete need a longer period to reach their ultimate strength. Also, the strength obtained from this could be higher than the strength that can be achieved by using cement only. The optimum strength of foamed concrete is achieved by increasing the ash content by replacing cement up to 75% by weight. In foamed concrete, High ash content results in a reduction in compressive strength at an early age. Also reduced the rate of hydration, but the long-term compressive strength was improved by using 75% of ash content replacing cement. The optimum content of ash is age-dependent, although porosity also affects the strength of the foamed concrete.

     

    Price of Cellular lightweight concrete

    Cellular lightweight concrete particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Cellular lightweight concrete. A large amount of large amount will be lower. The Price of Cellular lightweight concrete is on our company's official website.

     

    Cellular lightweight concrete supplier

    If you are looking for high-quality Cellular lightweight concrete, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com). We accept payment via Credit Card, T/T, West Union, and Paypal. TRUNNANO will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.


    Nov 10
    2023
  • What is Cellular lightweight concrete

    The study indicates that the optimum percentage treatment of banana fiber for use in CLC composites and to achieve the best mechanical properties was 6% NaOH treatment. The chemical deconstruction technique of banana fiber depicts that cellulose concentration increases while hemicellulose and lignin content decreases with increased alkali concentration in the treatment. This is caused by the ability of the NaOH to remove the amorphous component of the fiber while the crystalline cellulose remains insoluble. The incorporation of alkali-treated and untreated banana fiber in CLC resulted in a decrease in the workability of fresh composites. The untreated banana fiber composite exhibited lower workability due to the high hydroxyl group (-OH) content compared to the treated BFRFCLC composites. Composites with a higher percentage of alkali treatment absorb less water and hence exhibit higher workability. The introduction of alkali-treated banana fiber into CLC resulted in a peak increase in compressive strength at 6% NaOH concentration treatment of 40.6% and 59.8% for both untreated and plain control composites at 28 days. The increase in strength is because of the breakdown of the hydrogen bond between the hydroxyl groups, which resulted in the defibrillation of bundle fibers to fibrillates, thereby increasing the surface area of the fibers and culminating in improved load transfer between cement matrix and fibers. There is also a peak increase in flexural strength at 6% NaOH concentration treatment of the BFRFCLC composites of 63.8% and 117.4% compared to the untreated fiber composite and the plain control. A similar trend of peak percentage increments at 6% NaOH concentration treatment was recorded for the splitting tensile strength of BFRCLC composites at 28 days of 77.4% and 157.8%, compared to untreated fiber composites and plain CLC, respectively. Results were also recorded for the ultrasonic pulse velocity test. The percentage increases in terms of non-destructive parameters at 28 days for a peak 6% NaOH concentration treatment was by 14.1% and 15.3%, compared to the untreated fiber composites and plain control CLC.


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    Untreated fibre and plain CLC samples

    There was a continuous increase in the flexural strength of BFRCLC composites from 2% NaOH treatment to 10% NaOH, with the highest flexural strength increase experienced at 6% NaOH treatment of the fibers compared to the two controls (untreated fiber and plain CLC samples). The percentage increases in flexural strength for untreated fiber and plain-control samples were respectively 63.8% and 117.4%, which slightly declined at 8% NaOH treatment to 44.6% and 91.8%. They declined from 10% NaOH to 19.2% and 58.2%, all at 28 days of curing age. The reasons for these declines in strength from 6% NaOH treatment to 10% NaOH treatment were due to the over-washing of the fiber surface due to the high concentration of NaOH solution, as explained above. Hence, the 6% NaOH concentration solution treatment of banana fiber produces the best flexural strength properties. This is further bolstered by the mode of bending failure of the prismatic beam, and (c)), where the mode of fracture bending and crack deformation of beam reinforced with 4% and 8% treated NaOH concentration 8(a), and 8(c) is higher compared to the mode of deflection of fiber reinforced composites treated with 6% NaOH treatment 8(b). This implies that at 6% NaOH treatment, banana fiber surfaces were properly cleaned of lignin, pectin, hemicellulose, and oils, thereby releasing microfibrils on the cellulose surface. The defibrillated microfibrils increased the surface area of the banana fibers, which improved the fiber surface adhesion with the cement matrix, thereby drastically reducing the tendency for cracks and excessive deflection under bending.

     

    Compared to the untreated banana fibre control composites and plain CLC

    The splitting tensile strength rose with an increase in percentage concentration of NaOH treatment of composite fibers up to 6% NaOH treatment, where the tensile strength increment was the highest. The percentage increase in the tensile strength of BFRCLC composites at 28 days of curing age and 6% NaOH treatment was 77.4% and 157.8% compared to the untreated fibers control composites and plain CLC, respectively. At 28 days of curing age and compared to untreated fiber composites and plain control CLC, the percentage increase in tensile strength for 8%NaOH was by 41.9% and 106.3%, and for 10% NaOH treatment were by -18.3% and 18.8%. These percentage increases in tensile strength were far lower than in the 6% NaOH-treated fiber composites. Hence, in terms of tensile strength, BFRCLC composites with 6% NaOH-treated fibers performed better than all the other banana fibre-treated composites. Further clarification can be provided with the mode of splitting tensile failures of the destructive samples when tested in the laboratory. The crushed plain unreinforced control samples of the BFRCLC composites aged 28 days. The samples under splitting tensile stress were completely deformed by crushing into two equal parts, resembling the deformation shown by the 8% NaOH-treated fiber composites. However, 8% NaOH-treated fiber samples exhibited fewer crack openings compared to the unreinforced plain samples. The 6% NaOH-treated composite samples showed many minor cracks compared to the two samples under splitting tensile stress deformation.

     

    Price of Cellular lightweight concrete

    Cellular lightweight concrete particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Cellular lightweight concrete. A large amount of large amount will be lower. The Price of Cellular lightweight concrete is on our company's official website.

     

    Cellular lightweight concrete supplier

    If you are looking for high-quality Cellular lightweight concrete, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com). We accept payment via Credit Card, T/T, West Union, and Paypal. TRUNNANO will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.


    Nov 10
    2023
  • What is Cellular lightweight concrete

    Monolithic foam concrete is used for enclosure structures in the form of lightweight steel concrete structures, retaining walls, and backfill materials for highways, railways, and plazas. This material is characterized by a low density, good sound insulating properties, and high thermal insulation capacity, while it exhibits sufficient compressive strength for the load-bearing function. The use of monolithic foam concrete makes it possible to simplify and reduce the cost of construction and increase the volume of work more than ten times, compared with the laying of aerated concrete and foam concrete blocks, with a significant reduction in the number of workers. It also minimizes the use of cranes and lifting and reduces transport expenses and the area of the zones of materials storage. Monolithic foam concrete quality greatly depends on the type and quality of the foaming agent. There are two types of foaming agents for monolithic foam concrete: protein foaming agents and synthetic foaming agents.


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    A synthetic foaming agent is cheaper than a protein foaming agent

    Concrete based on synthetic foaming agents has shorter durability and lower strength compared to concrete based on protein foaming agents. The protein foaming agent (vegetable-based and animal-based) has more suitable characteristics to produce foam concrete. The research is devoted to the study of the pore structure of foam concrete. The use of fly ash as filler helps in achieving a more uniform distribution of air voids, which leads to an increase in the material strength. Finer filler material helps in the uniform distribution of air voids. A larger porosity results in a more significant effect of the moisture content on the effective thermal conductivity. When the volumetric moisture content reaches 10 %, the thermal conductivities of foam concrete and aerated concrete increase by approximately 200 % and 100 %, respectively. There are additives, such as fly ash metakaolin, shredded rubber, silica fume, and granulated blast furnace slag, which can improve concrete properties. The use of mineral additives regulates the porous structure of foam concrete; simultaneously, the coefficient of thermal conductivity is reduced, density is reduced, and frost resistance is improved.

     

    The research is devoted to the combination of foam concrete and lightweight aggregates

    The work shows an improvement in the compressive strength of such concrete by almost 40% compared to conventional foam concrete. The same applied to the drying shrinkage; the change in length is reduced by almost 80 %. Thermotechnical characteristics of foam concrete are investigated. The coefficients of thermal conductivity of foam concrete depend on its density, and it varies from 0.07 W/(m·o C) - to 0.24 W/(m·o C). Adding microspheres of perlite to foam concrete reduces its thermal conductivity coefficient to 0.062 W/(m·o C). The use of basalt and glass fiber, fine additives of wollastonite, and diopside reduces the thermal conductivity coefficient to 0.069-0.097 W/(mo C). The work shows the experimentally obtained thermal conductivity resistance of the enclosure structure from thin-wall profiles with foam concrete. It is 1.367 (m2 ·K)/W, taking into account thermal resistance 0.783 (m2 ·K)/W for reinforced sections. However, there is little research on foam concrete as part of lightweight steel concrete structures (LSCS). The works show fire resistance of lightweight steel concrete structures consisting of profiled steel filled with monolithic foam concrete with a 200 kg/m3 - 400 kg/m3 density and with fiber cement sheets sheathing. The actual fire resistance limit of samples of the slab panel fragment is at least REI 60 with a uniformly distributed load of 4 kN/m2.

     

    Price of Cellular lightweight concrete

    Cellular lightweight concrete particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Cellular lightweight concrete. A large amount of large amount will be lower. The Price of Cellular lightweight concrete is on our company's official website.

     

    Cellular lightweight concrete supplier

    If you are looking for high-quality Cellular lightweight concrete, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com). We accept payment via Credit Card, T/T, West Union, and Paypal. TRUNNANO will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.


    Nov 10
    2023
  • What is Cellular lightweight concrete

    The test for compressive strength of banana fibre-reinforced CLC was conducted using a steel mold of size 100 x 100 x 100 mm. The test was conducted based on curing periods of 7, 28, and 56 days. The compressive strength of CLC was determined. This test was conducted with the aid of a GoTech GT-7001-BS300 universal testing machine with a capacity of 3000kN. Three CLC specimens were produced for each testing period, and the average compressive strength for the three was recorded as the compressive strength at each curing period. It was conducted to determine the flexural strength of BFRCLC. The test was conducted using three samples of a specimen size (40 x 40 x 160) mm beam at each curing period of 7, 28, and 56 days. The effective span from the supports of the beam was measured as 120 mm. The average of each of the three specimens was used as flexural strength at each hydration period. This test was conducted as follows. The test was conducted in the laboratory using a GoTech GT-7001-BS300 universal testing machine. The splitting tensile strength of BFRCLC was determined using a cylindrical mold of size 100 mm diameter x 200 mm depth. Three samples of the specimen were produced for each of the curing periods of 7, 28, and 56 days. The average of the three specimens was recorded as the splitting tensile strength of the CLC. This test was conducted to determine the non-destructive velocity of the fibre-reinforced CLC composites produced in the study. The test was conducted on a concrete cube produced for a compressive strength test. The non-destructive test was conducted before the specimen was tested for compressive strength test in all cases at each curing period.


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    The use of banana fibre in CLC

    The use of banana fiber in CLC could also help to improve the thermal, insulating, and acoustic properties of banana fiber-reinforced composites. Banana fiber is a low-cost building material whose production emits little or no CO2 compared to synthetic fiber but rather releases O2 into the atmosphere. Furthermore, CLC is very brittle and fragile, with high shrinkage. Therefore, introducing banana fiber into its matrix could improve its properties, such as fracture toughness. Despite the interesting improvement of mechanical properties and numerous applications of concrete composites by adding banana trunk fiber, to the best of the researcher's knowledge, no study has been conducted or reported for alkali-treated BFRCLC. Previous studies on alkali treatment optimization of coir and oil palm empty fruit fibers focus only on fibers' mechanical and durability properties in composites of CLC. Attempting to bridge these gaps, this research aimed to investigate the mechanical properties of alkali-treated and untreated BFRCLC. This aim incorporated the following objectives: to demonstrate the sourcing, processing, and alkali treatment of locally available banana fiber; to determine the influence of alkali treatment of the banana fibers on the morphology, microstructure, and single fiber mechanical properties; to assess the impact of the alkali treatment on the mechanical properties of the BFRFC composites and to show how the impact of the treatment on single fibers affected the final mechanical properties of the composites; and finally to optimize the percentage concentration of alkali treatment of banana fiber in CLC composites.

     

    The concrete composite compared to untreated fibre reinforced CLC samples

    When the fiber was added to the fresh mortar mix, the workability of cement-sand mortar decreased. Results obtained through the flow table test indicate a sharp decrease in the workability of the fresh plain control sample of the concrete composite compared to untreated fiber-reinforced CLC samples. This was due to the hydrophilic nature of the untreated banana fiber surfaces and hydroxyl group compounds, resulting in excessive water absorption and the subsequent reduction in the workability of the untreated BFRCLC. The workability of the fresh untreated BFRCLC mix is lower than the workability of all the treated banana fibre-reinforced composites. The main factor contributing to this variation is similar in the case of plain CLC since untreated banana fiber has high hemicellulose and lignin content. The hydroxyl group content was also higher, resulting in higher moisture absorption than treated fibers at various treatment percentages. Treated banana fibers lost a lot of hemicellulose and lignin and absorbed less water than untreated. Thus, the workability of the untreated banana fiber composites was much lower than that of the treated. The degree of treatment also influenced water absorption and workability. Fibers with a high percentage of NaOH treatment absorbed less water. Hence, they exhibited higher workability than fibers with a lower percentage of NaOH treatment, which absorbed more water and exhibited higher water absorption.

     

    Price of Cellular lightweight concrete

    Cellular lightweight concrete particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Cellular lightweight concrete. A large amount of large amount will be lower. The Price of Cellular lightweight concrete is on our company's official website.

     

    Cellular lightweight concrete supplier

    If you are looking for high-quality Cellular lightweight concrete, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com). We accept payment via Credit Card, T/T, West Union, and Paypal. TRUNNANO will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.


    Nov 10
    2023

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  • Luoyang Tongrun Info Technology Co., Ltd. (cabr-concrete.com) is the world's leading nanomaterial technology developer and application manufacturer, the company has more than 20 years of industry experience, after years of scientific research and production, has been professionals in lightweight concrete and foam concrete solutions. We can supply concrete foaming agents, superplasticizers, aerogels and foam concrete strength enhancers for lightweight concrete mix, CLC blocks all over the world, suitable for ordinary cement foamed concrete cast-in-place, block, plate, insulation wall, etc.
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