scholarly journals Aerated Concrete Produced Using Locally Available Raw Materials

2017 ◽  
Vol 3 (4) ◽  
pp. 214-220 ◽  
Author(s):  
Faris Matalkah ◽  
Harsha Bharadwaj ◽  
Anagi Balachandra ◽  
Parviz Soroushian
Keyword(s):  
Thermal Conductivity ◽  
Raw Materials ◽  
Building Construction ◽  
Early Age ◽  
Foaming Agent ◽  
Foam Structure ◽  
Foaming Agents ◽  
Aerated Concrete ◽  
Concrete Materials ◽  
The Stability

Aerated concrete materials were developed with abundant natural materials. Aerated concrete can provide insulating qualities complemented with secondary structural attributes when used as core in sandwich composites for building construction. A hybrid binder that comprised lime and gypsum was used. Different foaming agents were considered for production of aerated concrete, including saponin that is found abundantly in different plants. Different formulations were considered, and the stability of the foam structure as well as the density and early-age compressive strength of the resulting aerated concrete were evaluated. One formulation comprising lime-gypsum binder with saponin foaming agent, with a density of 0.53 g/cm3, was further characterized through performance of thermal conductivity, split tension, flexure, elastic and shear modulus and sorptivity tests. The results pointed at the satisfactory balance of qualities provided by the aerated concrete when compared with alternative aerated concrete materials.

Preparation of Novel Foaming Agent and its Application in Foam Concrete

2013 ◽  
Vol 785-786 ◽  
pp. 305-307 ◽  
Author(s):  
Dong Lin ◽  
Qin Zhao ◽  
Gui Ge Hou ◽  
Juan Juan Zhao ◽  
Jing Tian Han
Keyword(s):  
Thermal Conductivity ◽  
Calcium Hydroxide ◽  
Thermal Insulation ◽  
Raw Materials ◽  
Expansion Rate ◽  
Foam Concrete ◽  
Foaming Agent ◽  
The Stability

A novel foaming agent was prepared using animal hoof and horn as raw materials via calcium hydroxideas a catalyzer and the performanc of the product was measured. The results show that the expansion rate of foaming agent can be more than 20 times, and the stability of foaming is very excellent. The foaming agent was used for preparing foam concrete and the performanc of the foam concrete was also tested. The results show that the thermal conductivity can be kept between 0.055 and 0.234 W/(m·k), and the foam concrete possesses light masses, little density and well thermal insulation.

scholarly journals Alternative foaming agents for fabrication of glass foam

2021 ◽  
Vol 11 (5) ◽  
pp. 39-48
Author(s):  
Ildikó Fóris ◽  
Gábor Mucsi
Keyword(s):  
Raw Materials ◽  
Powder Mixtures ◽  
Foaming Agent ◽  
Foaming Agents ◽  
Heat Treated ◽  
Specimen Density ◽  
Before And After ◽  
Different Temperatures ◽  
Glass Foam ◽  
Eggshell Waste

Glass foam tablets were produced from container glass bottles (CGB) using eggshell waste (ESW) and perlite (P) as foaming agent in different portions. The ground raw materials (CGB, ESW, P) were homogenized and pressed with hydraulic piston press machine at different pressures (in the case of P containing tablets 30 MPa and ESW containing tablets 15 MPa, 30 MPa and 40 MPa were used).The obtained glass tablets were heat treated at different temperatures (in the case of P containing tablets 800 °C, 900°C, 1000°C and 1100°C, and ESW containing tablets 600 °C, 700 °C, 800 °C and 900 °C were used). The study shows the specimen density of tablets before and after heat treatment, as well as the true density of the powder mixtures before tableting and the abrasion resistance of the glass foam products.

Performance Study of Fiber Reinforced New Lightweight Insulation Materials

2013 ◽  
Vol 662 ◽  
pp. 331-334
Author(s):  
Huan Qi Zhao ◽  
Guo Zhong Li
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Bending Strength ◽  
Raw Materials ◽  
The Self ◽  
Performance Study ◽  
Foaming Agent ◽  
Insulation Materials ◽  
Influencing Mechanism ◽  
Coefficient Of Thermal Conductivity

Cement-based lightweight insulation materials were made. Cement and fly ash are main raw materials. The self-developed composite excitation agent and foaming agent are used. The method of foaming is the physical foaming. The inflection of fiber dosage on the performance of lightweight insulation materials was researched. Its influencing mechanism was discussed. Experiments show that foaming lightweight insulation materials were made with 1.22MPa bending strength, 2.95MPa compressive strength and the 0.072W/mk coefficient of thermal conductivity when the fiber mixing content is 1.2%.

Investigation of the Raw Materials' Composition and Ratio Influence on the Structure and Properties of the Foamed Slag Glass

2016 ◽  
Vol 843 ◽  
pp. 183-188 ◽  
Author(s):  
E.A. Yatsenko ◽  
B.M. Goltsman ◽  
L.A. Yatsenko
Keyword(s):  
Raw Materials ◽  
Foam Glass ◽  
Thermal Power ◽  
Structure And Properties ◽  
Foaming Agent ◽  
Foaming Agents ◽  
Foamed Slag ◽  
Slag Glass ◽  
The Relationship ◽  
Foamed Slag Glass

The composition of the foam glass based on thermal power plant’s ash-slag waste – foamed slag glass – was developed. The synthesis of the samples based on the most widespread foaming agents was conducted at various temperatures. The structure and properties of the obtained samples were defined, the relationship between the type and amount of the introduced foaming agents and changes in the structure and properties of the samples were established. The best type of foaming agent for the synthesis of foamed slag glass has been selected. The production technology for products based on foamed slag glass was developed.

scholarly journals THE INFLUENCE OF THE FOAMING AGENTS NATURE ON PHYSICAL AND TECHNICAL PROPERTIES OF FOAM

2018 ◽  
Vol 3 (3) ◽  
pp. 5-12 ◽  
Author(s):  
Александр Попов ◽  
Aleksandr Popov ◽  
В.В. Нелюбова ◽  
Viktoriya Nelyubova ◽  
Д. Нецвет ◽  
...  
Keyword(s):  
Foam Expansion ◽  
Foaming Agent ◽  
Foaming Agents ◽  
Technical Properties ◽  
The Stability ◽  
Optimum Working

The paper considers the influence of the nature of foaming agent on the properties of foams. Based on the analysis of the market of modern pore-forming additives, from the number of foaming agents the most widely used components, as well as novelties of the market, have been chosen. The technical characteristics of the foaming agents provided on the market are reviewed. The influence of foaming agent concentration, composition and base on the foam expansion, stability and density of foams is studied in the paper. The optimum ("working") concentrations of foaming additives are determined taking into account their stability. The stability of foams formed on the basis of working solutions in porous systems of various compositions is studied. Based on the complex of studies, the protein foaming agents are ranked according to the degree of their effectiveness, according to the data on the physical and technical properties of foams obtained on their basis.

Preparation Thermal Insulation Masonry Mortar Using Regeneration Light Sand

2015 ◽  
Vol 768 ◽  
pp. 369-374
Author(s):  
Su Gai Cao ◽  
Pei Xin Li ◽  
Feng Qing Zhao ◽  
Zhi Guo Zhang
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Raw Materials ◽  
Low Cost ◽  
Steel Slag ◽  
Solid Wastes ◽  
Mixture Ratio ◽  
Aerated Concrete ◽  
Optimal Mixture Ratio ◽  
Masonry Mortar

In this paper, ecotype cementing materials (with steel slag, mineral slag etc. as the main raw materials), waste aerated concrete, regeneration light sand and etc. were used as the main materials to prepare thermal insulation masonry mortar. Then the impacts of materials on the mortar’s performances such as strength, density and thermal conductivity were analyzed. At last, it obtained the optimal mixture ratio to prepare thermal insulation masonry mortar with a strength degree of M5. This kind of mortar used a lot of solid wastes as raw materials but with many advantages such as light weight, low thermal conductivity and low cost, all of this made it became a new environmental friendly thermal insulation masonry mortar.

scholarly journals Effects of foaming agent on properties of foamed gel

2020 ◽  
Vol 29 ◽  
pp. 096369351988164
Author(s):  
Qing Cao ◽  
Jian-jun Shen ◽  
Wen-jie Guo
Keyword(s):  
Cross Linking ◽  
Ammonium Bromide ◽  
Foam Expansion ◽  
Foaming Agent ◽  
Foaming Agents ◽  
Foam Stabilizer ◽  
Foaming Property ◽  
Starting Point ◽  
Dodecyl Trimethyl Ammonium Bromide ◽  
The Stability

To improve foam expansion and the stability of the foamed gel selected as the starting point, three foaming agents with relatively higher foam expansion and three foam stabilizers were used to determine optimum gradient and composition of the gel. Sodium laurate and dodecyl trimethyl ammonium bromide at a proportion of 2:3 were observed to produce the desirable foaming property and also created the largest foaming volume after the addition of 0.2% polyethylene glycol as the foam stabilizer. Different concentrations of gelatinizing and cross-linking agents were added to the foamed gel containing the foaming agent and the foam stabilizer. The most suitable ratio of the gelatinizing agent and the cross-linking agent determined on the basis of volume of foam dewatering after the addition of foam stabilizer for 6 h was 0.6%:0.5%. The resulting foamed gel was evaluated for rheological and plugging properties and a decrease in the viscosity of the gel and better plugging effect on coal seam were observed.

scholarly journals Research on Properties of Foamed Concrete Reinforced with Small Sized Glazed Hollow Beads

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Chi Hu ◽  
Hui Li ◽  
Zhongwei Liu ◽  
Qingyuan Wang
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Vegetable Protein ◽  
Ordinary Portland Cement ◽  
Raw Materials ◽  
Test Sample ◽  
Foaming Agent ◽  
Air Voids ◽  
Foamed Concrete ◽  
Air Void

Foamed concrete (400 kg/m3) was prepared through a physical foaming method using ordinary Portland cement (42.5R), vegetable protein foaming agent, fly ash, and glazed hollow beads (GHB, K46) as raw materials. The performance of cement paste as well as the structure and distribution of air voids was characterized by rheometry, SEM, and XRD analyses with imaging software. The effects of GHBs on the compressive strength and thermal conductivity of the foamed concrete sample were also explored. Results show that the proportion of 50–400 μm air voids, average air-void diameter, 28 d compressive strength, and thermal conductivity of the test sample mixed with 2.4 wt% GHBs are 94.44%, 182.10 μm, 2.39 MPa, and 0.0936 w/(m·k), respectively. Excessive amount of GHBs (>2.4 wt%) increases the amount of air voids with diameter smaller than 50 μm in the hardened foamed concrete as well as the degree of open porosity. Moreover, the proportion of 50–400 μm air voids, average air-void diameter, 28 d compressive strength, and thermal conductivity of the sample mixed with 4.0 wt% GHBs are 88.54%, 140.50 μm, 2.05 MPa, and 0.0907 w/(m·k), respectively.

scholarly journals Highly Efficient Glass Ceramic Thermal Insulation

2021 ◽  
Vol 263 ◽  
pp. 01017
Author(s):  
Ivan Vedyakov ◽  
Vladimir Vaskalov ◽  
Nikolai Maliavski ◽  
Mikhail Vedyakov
Keyword(s):  
Thermal Conductivity ◽  
Water Absorption ◽  
Thermal Insulation ◽  
Water Resistance ◽  
Raw Materials ◽  
High Water ◽  
New Production ◽  
Foaming Agent ◽  
Applied Technology ◽  
Foaming Temperature

Alkali-silicate thermal insulation materials (foam silicates) belong to the group of mineral heat insulators. Their main disadvantage is insufficient water resistance, to increase which special water-strengthening additives are introduced into materials. The aim of this work was to obtain and study foam silicates in granular (FGCG) and slab (FGCS) forms using a new production technology characterized by a simple one-stage technological scheme. Natural or technogenic amorphous silica, glassy sodium silicate (with the addition of carbonate or hydroxide) and a carbon-containing foaming agent, were used as the raw materials. Some part of the silica component was included in the binder solution, which made it possible to increase the silicate modulus in the final product to 5-10. This factor together with rather high Al2O3 concentration in the silica raw, made it possible to obtain foamed materials of very high water resistance. Another feature of the applied technology was a high foaming temperature (750–900°C). This factor makes a significant contribution to improving the water resistance of foam silicates, and significantly reducing their thermal conductivity and water absorption. As a result, FGCG was obtained with a bulk density of 170-440 kg/m3 (for FGCS – 300-400 kg/m3), a compressive strength in a cylinder of 0.5-6.3 MPa, a thermal conductivity of 0.046-0.084 W/(m·K) and a water absorption of 7.8-13.5% by volume. Mass loss of the specimens in boiling water was 0.12-0.33%, which puts obtained foamed materials on a par with most waterproof foam silicates being produced today.

scholarly journals Determination of the Influence of Hydraulic Additives on the Foaming Process and Stability of the Produced Geopolymer Foams

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5090
Author(s):  
Michał Łach ◽  
Kinga Pławecka ◽  
Agnieszka Bąk ◽  
Katarzyna Lichocka ◽  
Kinga Korniejenko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Portland Cement ◽  
Polyurethane Foams ◽  
Expanded Polystyrene ◽  
Foaming Agent ◽  
Foaming Agents ◽  
Foaming Process ◽  
Al Powder ◽  
The Stability

The research described in this article was aimed at determining the influence of hydraulic additives on the foaming process and the stability of the produced geopolymer foams. These foams can be used as insulation materials to replace the currently commonly used insulations such as expanded polystyrene or polyurethane foams. Geopolymers have low thermal conductivity, excellent fire- and heat-resistant properties, and have fairly good mechanical properties. Research on foamed materials shows that they have the highest class of fire resistance; therefore, they are most often used as insulation products in construction. Geopolymer foams were made of aluminosilicate materials (fly ash) and foaming agents (H2O2 and Al powder), and the stabilizers were gypsum and portland cement. Additionally, surfactants were also used. It was found that better foaming effects were obtained for H2O2—it is a better foaming agent for geopolymers than Al powder. When using a hydraulic additive—a stabilizer in the form of cement—lower densities and better insulation parameters were obtained than when using gypsum. Portland cement is a better stabilizer than gypsum (calcium sulfates), although the effect may change due to the addition of surfactants, for example.

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