Insulation Mortar Research Articles

Study on Preparation and Properties of Composite Insulation Mortar

Orthogonal testing method was used to study the effects of fly ash, aggregate, weight ratio of water and material, way of incorporation of hydrophobic agent, on dry density, compressive strength, water absorption and softening coefficient of composite insulation mortar. The optimal ratio was obtained as 15% of the total weight is fly ash, 40% of the weight are aggregate, weight ratio of water and material are 1.1, 0.2% is hydrophobic agent (hydrophobic agent was added in the mixture). The main performances of the mortar were recorded as dry density was 220Kg/m3, compressive strength after 28 days was 0.50MPa, and thermal conductivity 0.0593W/(m•K). Microstructure of the composite insulation mortar was analyzed by SEM (scanning electron microscopy) and its function mechanism was studied preliminarily.

Study on Preparation and Properties of Foam Glazed Hollow Bead Thermal Insulation Mortar

This paper is the result of research on preparation and properties of foam glazed thermal insulation mortar by means of orthogonal experiment method, the influence of main preparation process parameters on mortar’s dry density and compressive strength, and the optimum combination was obtained. The micro-structure of foam glazed hollow bead insulation mortar was analyzed by scanning electron microscope (SEM), and the mechanism of glazed hollow bead and foaming agent was preliminarily discussed.

Mechanical Strength and Microstructure Analysis of Cementitious Wheat Straw Composite

Wheat straw alkali treatment has impacts on the strength of cement mortar and glazed hollow beads insulation mortar. The results show that the bending strength and bending strength of cement mortar specimen with 4% wheat straw are respectively 58.3% and 40.9% of the benchmark specimen, but bending-press ratio of the latter is 1.42 times of the former. The SEM images reflect the straws influences on the cement hydrate morphology, status and the influence of the number on cement mortar and glazed hollow beads insulation mortar. Compared with the latter, the former C-S-H gel is loose fibrous, failure to form a good network. In the thermal insulation mortar consistency and stratification of the same circumstances, with straw dosage increased, strength first increases, then declining. And folding pressure than in straw dosage is less than 24% more ideal. The SEM pictures show that network C-S-H gel decrease and loose fibrous C-S-H gel increased. At the same time, AFt gradually become attenuate and curly.

The Discussion of Problems in Popularization and Application of the System of Inorganic Thermal Insulation Mortar with Vitrified Beads

The application situation of the inorganic thermal insulation mortar with vitrified beads as aggregates is displayed through the method of market research in this paper. The problem of high construction cost in the inorganic thermal insulation mortar with vitrified beads as aggregates, raw materials market monopoly, high specific water absorption, poor construction process is discussed. And put forward the corresponding solutions to solve these problems, as the inorganic glass beads can provide a theoretical basis on the substitution.

A Study of the Effect of Modified Materials on the Performance of Thermal Insulation Mortar with Cinders and Phase Change Materials

The thermal insulation mortar with cinders and phase change materials which is made from expanded perlites adsorbing composite phase change material, cinders and vitrified small ball as lightweight aggregate has the characteristics of both energy storage and thermal insulation. In this paper,we studied the effect of redispersible emulsion powder, methyl cellulose ether, organic fiber and water-reducing agent on the performance of thermal insulation mortar with cinders and phase change materials. The result showed that all the performance met the national standards of the thermal insulation mortar.

The Relationship of the Main Properties of Desulphurization Gypsum Based Inorganic Thermal Insulation Mortar

This paper studies the relationship of the main properties of desulphurization gypsum based inorganic thermal insulation mortar. The results show that there are different linear correlations between fresh bulk density, hardened bulk density, compressive strength, volume water absorption, thermal conductivity and dry bulk density that is from 240 kg·m-3 to 500 kg·m-3. The linear correlations can provide some useful reference for the research and application of desulphurization gypsum based inorganic thermal insulation mortar.

Rearch on the Water Repellency of Inorganic Insulation Mortar

Three kinds of methods to improve the hydrophobicity of inorganic insulation mortar is studied in this paper.The results show that, the three methods have different influences on the water absorption rate of inorganic insulation mortar. Adding silane in mortar effects most and the surface modification of vitrified small ball effects least. Using the surface modification of vitrified small ball and spraying silane on the mortar surface together has little influence on the water repellency of mortar. However using of adding silane in mortar and spraying silane on the mortar surface together has remarkable influence. Using the three methods together will effect most.

The Study of the Crack-Resistant Plaster Mortar of Sand Autolaved Aerated Concrete Blocks

In view of the problems of crack and falling off when using ordinary mortar aerated concrete blocks, this paper investigate the plaster mortar of sand aerated concrete blocks. On the basis of single factor experiments of the effects of plaster mortar composition on its performance, the properties of plaster mortar are optimized by orthogonal experimental method. The results indicate that the mixture of vitrified microbeads, perlite, fly ash according to a certain proportion can produce laying and the plaster inorganic insulation mortar that exhibit low thermal conductivity coefficient and mechanical performance that meet the requirements.

Experimental Study of External Thermal Insulation Mortar Based on Fly Ash Floating Bead

In this paper, the development and properties of floating bead insulation mortar were introduced. Based on the experimental study, a new kind of exterior wall external thermal insulating mortar had been successfully produced. For this material, fly ash floating bead and expanded pearlite which was modified by hydrophobe were taken as the lightweight aggregate, meanwhile, Portland cement was used as the inorganic binder, also the fiber and polymer were taken as the additive. The results of experiments indicated that properties of fly ash floating bead insulating mortar, such as thermal insulation, strength, crack resistant and climate resistant, were superior to those of expanded pearlite insulating mortar. On the other hand, other properties, such as bulk stability, aging resistant, climate resistant, crack resistant and fireproofing, construction workability were much better than those of expanded polystyrene sheet ( EPS) insulating mortar.

Mix Ratio Design and Performance Optimization of Vitrified Microsphere Insulating Mortar

Vitrified microsphere insulation mortar is a new type building insulation mortar which developed in recent years, with having the advantages of well workability, high intensity and fire prevention. But because the vitrified microsphere we use of which much exists on the defects of high dry density and bad insulation effect, it analyzed deeply kinds of factors which influence on the physical and mechanical properties of vitrified microsphere insulation mortar, making use of orthogonal experiment to optimize the composition materials of insulation mortar. The orthogonal test results show that the most influential raw materials factors to mortar insulation properties and 28d compressive strength followed by aggregate, polypropylene fiber, fly ash and latex powder.

The Research of Scrap Tire Rubber Powder Effect on the Performance of Cracking Mortar

Through the contrast test of the different proportion scrap tire rubber powder insulation mortar, the scrap tire rubber powder influence on cracking mortar performance such as the physical, mechanical performance and the shrinkage cracking. Experiment shows that waste rubber particles can improve mortar toughness; the mortar drying shrinkage and the crack of early plastic shrinkage are restrained effectively. But for keeping mortar workability and mortar compressive, flexural strength is the effect of unfavorable.

Orthogonal Experimental Study on Thermal Insulation Mortar Containing Mixed Ceramic Sand and Vitrified Micro Bead Aggregates

Orthogonal Experimental Study on Thermal Insulation Mortar Containing Mixed Ceramic Sand and Vitrified Micro Bead Aggregates

Orthogonal Experimental Study on Thermal Insulation Mortar Containing Mixed Ceramic Sand and Vitrified Micro Bead Aggregates

Mixed light aggregates can effectively reduce the coefficient of thermal conductivity of composite materials. Through orthogonal experiments of thermal insulation mortar containing mixed ceramic sand and vitrified micro bead aggregates, we analyzed the law of influence of relevant factors on the dry bulk density, coefficient of thermal conductivity and compressive strength of mortar containing mixed ceramic sand and vitrified micro bead aggregates and provided basic data for further improvement of such thermal insulation mortar so as to promote the development and application of high performance thermal insulation materials.

Utilization of phase change materials and rubber particles to improve thermal and mechanical properties of mortar

Phase change materials (PCMs) and rubber particles from recycled tires were used in portland cement mortar with a potential application as insulation mortar. Series of tests were designed and conducted including compressive strength, flexural strength, thermal conductivity, drying shrinkage, and bond strength tests at 7 days and 28 days of age. Different types of additives were also used in the mix designs. The experimental results showed that mechanical properties of rubberized-mortar can be improved by adjusting the size of rubber particles and the amount of additives. With the same volume fraction of PCM and rubbers, the mechanical properties of PCM-modified mortar are either the same or better than that of rubberized-mortar. In terms of thermal properties, the rubber particles can reduce thermal conductivity of the mortar significantly, while the PCM can improve heat capacity of the mortar.

Thermal Design on Cement-Based Vitrified Microsphere Insulation Mortar Based on 65% Building Energy Efficiency Standard

With the 65% building energy efficiency standards being implemented, the existing external wall insulation technology will face severe challenges. The research and application of the high performance inorganic insulation materials are solicited, because the traditional organic insulation materials representative with polystyrene have some defects, such as poor fire resistance, poor durability, short service and no synchronous with the life of structure, and environmental pollution. After the big fires of the CCTV building in 2009 and the building under construction at Shanghai pudong south road NO.1 in 2010, October 8 in the morning being occurred, the new generation inorganic insulation materials represented by vitrified microsphere, are getting increasing attention. After the thermal simulation of external walls, roof, floor and windows being calculated, it is concluded that its energy-saving rate is far more than energy efficiency 50% standard, and which is close to energy efficiency 65% standard, even if taking only vitrified microsphere as the insulation mortar for outer walls of building.

Experimental Study on Crack Resistance of Ceramic Sand Insulation Mortar

This article analyzes about four aspects of insulation mortar of various performance indicators, including anti-cracking, flexural strength and compressive strength, shear bond strength and shrinkage rate, it is concluded that the insulation mortar meets to various performance indicators requirement of masonry mortar or plastering mortar.

The Preparation and Properties of the Low Melting Point Microencapsulated Paraffin Insulation Mortar

Phase-change thermal storage insulation mortar was prepared by using low melting point paraffin as phase change material (PCM), added with appropriate cementing materials, additives and water in this paper. The construction performance, mechanics and thermal properties of the insulation mortar were tested. The results showed that the compatibility between the microencapsulated paraffin (MCP) and inorganic cementing materials was improved by using the silane coupling agent and binder to modify the surface of the MCP, that the cracking of the mortar was solved by introducing the fibers to improve the toughness in the low melting MCP insulation mortar, that the primary physical properties of phase change mortar accord with the standard of the similar mortar, and that it has a favorable phase-change thermal storage ability and an increasingly wide utilization.

Influence of Air Entraining Agent on Performance of Inorganic Thermal Insulating Mortar

This paper presents a laboratory study on the effect of air entraining agent on the performance of thermal insulating mortar with glazed hollow bead. The test results show that with the dosage of air entraining agent increases, the consistency of thermal insulating mortar increases, apparent density, thermal conductivity and drying shrinkage decline, However, the compressive strength greater losses owing to excessive consumption of air entraining agent; air entraining agent within a certain dosage can significantly improve the operating performance of thermal insulation mortar, increase its consistency and reduce its apparent density, thermal conductivity coefficient and drying shrinkage. Due to excessive addition of air entraining agent, the apparent density, thermal conductivity and compressive strength of thermal insulation mortar all increase. For a specific insulation mortar, there will exist the best mixing amount of air entraining agent.

The Effect of Silane Coupling Agent and Fiber on Microencapsulated Paraffin Insulation Mortar

This paper mainly deals with the preparation and performance of microencapsulated paraffin insulation mortar. Silane coupling agents are used to modify the surface of the microencapsulated paraffin, and fibers are introduced to solve the cracking of microencapsulated paraffin insulation mortar. Research has been carried out on the effect of the type and dosage of silane coupling agents and fibers on the performance of insulation mortar, the result of which shows that KH550 and polypropylene fiber are of good performance and that their optimum dosages are 13% and 0.3% respectively, the dosage was referred to as the percentage according to the weight of cement.

Predicting the shrinkage of thermal insulation mortar by probabilistic neural networks

This study explored the potential of using probabilistic neural networks (PNN) to predict shrinkage of thermal insulation mortar. Probabilistic results were obtained from the PNN model with the aid of Parzen non-parametric estimator of the probability density functions (PDF). Five variables, water-cementitious materials ratio, content of cement, fly ash, aggregate and plasticizer, were employed for input variables, while a category of 56-d shrinkage of mortar was used for the output variable. A total of 192 groups of experimental data from 64 mixtures designed using JMP7.0 software were collected, of which 120 groups of data were used for training the model and the other 72 groups of data for testing. The simulation results showed that the PNN model with an optimal smoothing parameter determined by the curves of the mean square error (MSE) and the number of unrecognized probability densities (UPDs) exhibited a promising capability of predicting shrinkage of mortar.