Foamed concrete containing various amounts of organic-mineral additives (original) (raw)
Related papers
Applied Sciences, 2019
The main objective of this study was to evaluate the use of additives in producing foamed concrete blocks, which were made by totally replacing natural sand with civil construction waste (CCW). The concrete blocks were developed in accordance with an experimental design that used the complete factorial statistical method, for which three factors with different levels were considered: cement type (CP-V, CP II-Z, and CP II-F); use of additive (without additive, plasticizer, air entrainment, and superplasticizer) and foam amount (5.7%, 7.7%, and 9.5% of the total mass). The influence of each factor and the interactions between them were assessed on the following response variables: compressive strength, dry and saturated density, air voids, water absorption, and thermal conductivity. The results show that all factors had a significant influence on the variable response. For example, the use of the superplasticizer additive resulted in higher compressive strength, lower density, lower a...
A study on properties of foamed concrete with natural and synthetic foaming agent
2009
Foamed concrete consists of cement, water, fine aggregate and air voids. It is relatively homogeneous and do not contain coarse aggregate phase. Properties of foamed concrete depends on the type of binder and foaming agent used. Here two types of foaming agents are used-natural and synthetic. A partial replacement of binding material is done with silica fume which provides additional strength compared to foam concrete without silica fume. This paper which based on the foam concrete properties and preparation process analyses the research progress of silica fume effect on performance of foamed concrete.
The Mechanical Properties of Foamed Concrete containing Un-processed Blast Furnace Slag
MATEC Web of Conferences, 2014
For many years, supplementary cementation materials have been utilized as cement or filler replacements to heighten the properties of concrete. The objective of this paper is to demonstrate the effects of un-processed blast furnace slag (RS) on the compressive, splitting tensile and flexural strengths of foam concrete over periods of 7, 14 and 28 days. The introduction of slag to the cement begins at 30% and rises to 70% of the total content. Six mixes, which include the control mix with a similar mix ratio (1:2:0.45) and a dry density of 1300 kg/m 3 is generated. Taking into consideration, from the total weight of the cementation material, 1% of super-plasticizer (PS-1) is added to the mixes with slag content. Test results revealed that the most favourable (optimum) replacement level of un-processed slag in foam concrete is 30%. This represents a commercial advantage as the cement requirement is reduced from 414 Kg/m 3 to 290 Kg/m 3. On the 28 th day, the optimum mix showed higher values than the control mix by 32% for compressive strength, 46.5% for splitting tensile strength and 61% for flexural strength.
Influence of granulated blast furnace slag on mechanical properties of foam concrete
Cogent Engineering, 2017
This paper experimentally comparing the mechanical properties between ground granulated blast furnace slag (GGBS) and unground blast furnace slag (GBS) as a partial replacement for cement for the production of foam concrete. A total of 14 foam concrete mixes were prepared under a design density of 1,300 kg/m 3 , two different filler-to-binder ratios, and cement replacement levels of 30-70% of the weight of the binder. A soluble salt of polymeric sulfonates of organic compounds (PS-1) was added to the mixes, with GGBS and GBS replacements at a dosage varying from 0.2-2% of the total cementitious material. Compressive, flexural, and tensile strengths were investigated for up to 90 days. Results show that foam concrete with superior quality as compared with that of the control mix can be produced by using GBS. Results show that 30% GBS foam concrete mix exhibited higher compressive, flexural, and splitting tensile strengths than the control mix of GBS at all ages for both filler-to-binder ratios.
IRJET, 2020
Nowadays, builders across the world are paying increasing attention to use eco-friendly material as replacement for conventional building materials. The adverse development in construction field has initiated for using light weight concrete with good characteristics. Foam concrete is a mixture of cement, fine sand (substituted by fly ash), water and predetermined volume of foam. By diluting the foam in agent with water and aerated to form foam. Cement paste get hardens once it sticks with foam. Foaming agents may be synthetic or protein based foaming agents. Foaming agents which comes from animal proteins such as blood, bones of cows, pigs and other animal carcasses are classified under protein based. An attempt has been made to determine the strength and durability characteristics of M20 grade Foam concrete by using synthetic foaming agent.
Jurnal Teknologi, 2020
Since the foam concrete is delicate, it is important to carefully choose the additives, such as superplasticiser (SP), to be used in this type of concrete. The effect of using different types and percentages of SP on the performance of foam concrete with target density of 1500±50 kg/m3 has been investigated in this study. A sustainable material, Palm Oil fuel ash (POFA), used as a sand replacement at a level of 20% by weight. Five types of SP have been used in this study, including Sulphonated polymer-based, selected synthetic and organic polymers-based and three Polycarboxylate ether-based (PCE). Different SP contents (0.0%, 1.0% and 2.0%) have been used as a ratio of cement weight. Workability, consistency, foam stability and mechanical properties were investigated. The results showed that types and quantity of SP have a significant effect on the different properties of the foam concrete. Workability, compression strength and tension strength improved remarkably for most specimens...
Effect of additives on mechanical and thermal properties of lightweight foamed concrete
This paper reports the results of experimental works that have been performed to investigate the mechanical and thermal properties of lightweight foamed concrete (LFC) with different additives. LFC with three different densities of 600, 1000 and 1400 kg/m 3 were cast and tested. Fly ash, lime and polypropylene fiber were incorporated with the LFC at different proportions. Compressive, flexural and drying shrinkage tests were carried out up to 180 days to evaluate the mechanical properties. The Hot Disk Thermal Constants Analyzer was used to establish different thermal conductivity values of LFC of different densities and additives. Scanning electron microscopy was used to give a detail view on each of particles produced by the reaction of additives in hydration process. The addition of additives in LFC showed no contribution on compressive strength but improvement in the flexural and shrinkage test results. LFC integrating various additives only contribute slight increase for therma...
Recently, the efforts on the development of environmentally friendly construction materials with particular attention on the utilization of industrial waste materials in their manufacturer for sustainable development are highly desirable. Consequently, foamed concrete is an alternative concrete that has possibility for utilization of waste materials. One of the industrial wastes that are becoming attractive nowadays is waste paper sludge ash (WPSA), a local by-product produced abundantly by the paper newsprint industry. Previous studies revealed that WPSA contains considerable quantities of alumino-siliceous material and can be used as a unique cement replacement material. Furthermore, along with the growth in population and rapid urbanization currently, huge amount of concrete wastes are being generated widely. For this reason, recycling of this waste as a source of aggregate is increasingly being used in concrete. Attempts have been made to incorporate incinerated WPSA and fine recycled concrete aggregate (FRCA) to produce new types of lightweight foamed concrete. The aim of this investigation is to study the effect of the inclusion of WPSA and FRCA replacement as cement and sand content respectively with respect to the compressive strength performance of foamed concrete. The finding of the present study exhibited that WPSA and FRCA seems to contribute to a favorable compressive strength of foamed concrete.
Physical, mechanical and thermal properties of lightweight foamed concrete with fly ash
IOP Conference Series: Materials Science and Engineering
This study aims to investigate the effect of fly ash content on the density, thermal conductivity, compressive strength and water absorption of Lightweight Foamed Concrete (LFC). This LFC consists of cement, water, sand, fly ash (FA) and foam. The foam is needed to to create air voids in the mixture and reduce its weight. The foaming agent which was diluted in the water was given air pressure using foam generator to produce foam. The LFC are made with water-cement ratio of 1:1 and cement-agregat ratio of 1: 4. Aggregates consisted of sand and FA varied by 0%, 10%, 20% and 30% in weight. The content offoam was 30% and 40% of the mortar volume. The increasing of foam content decreases density, thermal conductivity, and compressive strength of LFC. However, that increases its water absorption. The increasing of FA contentalso decreases water absorption, but it density, thermal conductivity and compressive strength.
Advanced Materials Research, 2013
In this study, the mixing of polystyrene (PS) beads and fly ash as a sand replacement material in foamed cement composites (FCC) has been investigated. Specifically, the mechanical properties such as compressive strength and flexural strength were measured. Different proportions of fly ash were added in cement composites to replace the sand proportion at 3 wt. %, 6 wt. %, 9 wt. % and 12 wt. % respectively. The water to cement ratio was fixed at 0.65 meanwhile ratios of PS beads used was 0.25 volume percent of samples as a foaming agent. All samples at different mixed were cured at 7 and 28 days respectively. Based on the results of compressive strength, it was found that the compressive strength was increased with the increasing addition of fly ash. Meanwhile, flexural strength was decreased with the increasing addition of fly ash up to 9 wt. %. The foamed cement composites with 12 wt. % of fly ash produced the highest strength of compressive strength meanwhile 3 wt. % of fly ash pr...