Light-weight Dry Masonry Mixes with Hollow Ceramic Microspheres for Winter Conditions

Semenov, V. S.; Rozovskaya, Tamara

doi:10.1016/j.proeng.2016.08.210

Cited by 7 publications

(7 citation statements)

References 1 publication

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“…Earlier, the authors of [3] [3] in a calculated manner, depending on the water-cement ratio of mortar mixes. The technological properties of mortar mixes and the physical-and-mechanical properties of modified dry mixes with hollow ceramic microspheres and various antifreeze additives in the hardened state were also researched -tensile strength under bending and compressive strength after 14 and 28 days at hardening temperatures of (20 ± 2) ° С and -10 ° С.…”

Section: Resultsmentioning

confidence: 99%

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Properties of lightweight dry masonry mixtures for winter conditions

Semenov

2019

E3S Web Conf.

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The construction of building envelopes using effective small-piece elements requires the use of lightweight masonry mortars, obtained, as a rule, from dry mixtures. One of the most effective ways to obtain such mortars is the introduction of hollow ceramic microspheres into their composition as a lightweight filler. For the climatic conditions of the Russian Federation, it is relevant to use dry masonry mixtures in the winter version, which gain strength at negative temperatures. The main purpose of this work was the development of optimal compositions of modified dry masonry mixes with hollow ceramic microspheres and antifreeze additives for use in winter conditions. Determination of the main properties of dry mixes and masonry mortars was carried out according to standard methods. X-ray diffraction and scanning electron microscopy were used to research of the microstructure and phase composition of the materials. As a result of this research, the compositions of the lightweight dry masonry mixtures for winter conditions were developed. The main properties of the mortar mixtures and mortars were determined and structure and composition of new phases of cement stone were studied as well.

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Section: Resultsmentioning

confidence: 99%

“…Mortar is guaranteed to gain only 30% strength at negative temperatures after 28 days of hardening. In fact, the mortars may not gain the minimum compressive strength of 1.0 MPa, as regulated by normative documents [3]. In addition, mortars with antifreeze additives can produce salt efflorescence on the surface of the masonry.…”

Section: Introductionmentioning

confidence: 99%

Properties of lightweight dry masonry mixtures for winter conditions

Semenov

2019

E3S Web Conf.

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“…Would the strength of the LCC be higher if the crushing strength of microspheres can be increased? Artificial fine microspheres aggregates, namely, soda–lime–borosilicate-based glass microspheres, were adopted as an alternative to FAC to improve the mechanical and even functional properties of lightweight concrete [ 42 , 43 , 44 , 45 ]. The use of glass microsphere (GM) products has increased tremendously in recent years [ 46 , 47 , 48 , 49 , 50 , 51 ].…”

Section: Introductionmentioning

confidence: 99%

“…They owned features with light weight, large bulk, low thermal conductivity, high crushing strength, and good flow properties, which would be an excellent filler material for cement composites. However, the past research revealed that the cement composites incorporating glass microspheres had low compressive strength and elastic modulus [ 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel, Multifunctional, Floatable, Lightweight Cement Composite: Development and Properties

et al. 2018

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This paper presents the development of a novel, multifunctional, floatable, lightweight cement composite (FLCC) using three different types of glass microspheres for structural engineering applications. Eight different mixtures of FLCC were produced and their matrix-related parameters were examined experimentally by adopting different types of microsphere fillers, fiber content (polyethylene fibers (PE)), and water-to-binder ratios. Along with the mechanical properties such as compressive, flexural, tensile strengths, and modulus of elasticity, the water tightness of the material was evaluated by sorptivity measurements and the energy efficiency by thermal conductivity. The optimal FLCC has an oven-dry density of 750 kg/m3, compressive strength (fcm) up to 41 MPa after 28-day moist curing, low thermal conductivity of 0.152 W/mK, and very low sorptivity. It is found that an optimized amount of PE fiber is beneficial for improving the tensile resistance and ductility of FLCC while a relatively large amount of microspheres can increase the entrapped air voids in the FLCC matrix and reduce its density and thermal conductivity. Microstructural analysis by scanning electron microscopy (SEM) reveals that the microspheres are distributed uniformly in the cement matrix and are subjected to triaxial compression confinement, which leads to high strength of FLCC. Segregation due to density difference of FLCC ingredients is not observed with up to 60% (by weight) of glass microspheres added. Compared to the other lightweight aggregate concretes, the proposed FLCC could be used to build floating concrete structures, insulating elements, or even load-bearing structural elements such as floor and wall panels in which self-weight is a main concern.

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“…Microspheres and polymers (including latex based ones) are modern materials that enable modifying the properties of concrete, including improving its frost resistance [8,9,10,11]. Both polymers and microspheres modify the concrete structure tightening it [12,13,14,15].…”

Section: Introductionmentioning

confidence: 99%

Transient method measured thermal properties of concrete with microspheres and latex based addition

Jaskulski

Kubissa

2018

MATEC Web Conf.

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The goal of the performed research was to determine the influence of microspheres from fly ash and the latex based addition on the thermal properties of concrete. The tested additions were used in two different proportions each and they were combined with each other. As a reference two series of concrete were used: one without any addition and another with 0.2% of air entraining agent. The thermal properties were measured using transient method with ISOMET 2114 apparatus. No clear trends were observed in case of the results of the measurements of the thermal diffusivity and the volumetric heat capacity. While the results of the thermal conductivity coefficient show that both additions has a potential of lowering the thermal conductivity but they are not so efficient as air entraining agent.

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Light-weight Dry Masonry Mixes with Hollow Ceramic Microspheres for Winter Conditions

Cited by 7 publications

References 1 publication

Properties of lightweight dry masonry mixtures for winter conditions

Properties of lightweight dry masonry mixtures for winter conditions

A Novel, Multifunctional, Floatable, Lightweight Cement Composite: Development and Properties

Transient method measured thermal properties of concrete with microspheres and latex based addition

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