Properties of Light-weight Extruded Concrete with Hollow Glass Microspheres

Орешкин, Д В; Semenov, V. S.; Rozovskaya, Tamara

doi:10.1016/j.proeng.2016.08.214

Cited by 34 publications

(22 citation statements)

References 4 publications

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“…Adicionalmente, se ha reportado en trabajos previos que las partículas de polímeros generan una elevada porosidad en concretos modificados, a causa del aire atrapado por las partículas de caucho, de manera que aumenta el porcentaje de vacíos de aire, por ende, disminuye la densidad de los especímenes de concreto [24]. Los resultados encontrados indican que la disminución en la densidad es menor al 10%, lo cual está acorde con los resultados previamente reportados, [10], [12], [25], [26], donde la incorporación de microesferas de vidrio con densidades entre 150 Kg/m 3 hasta 900 Kg/m 3 , generó disminuciones en la densidad de los materiales preparados alrededor del 20%, sin embargo, las microesferas utilizadas por los autores presentaron densidades muy inferiores a las reportadas en este trabajo.…”

Section: Caracterización De Los Materialesunclassified

Evaluación de las propiedades mecánicas de concretos modificados con microesferas de vidrio y residuos de llantas

2019

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El efecto combinado de residuos de llantas y microesferas como sustitutos de la materia prima utilizada en la elaboración convencional de concretos fue explorada en este trabajo. Se diseñaron y prepararon mezclas de concreto tradicional, con modificaciones del 15% en masa de los agregados finos con relaciones de residuos de llantas, microesferas de vidrio de 0:1, 1:1, 1:3, 3:1 y 1:0. A partir de las mezclas preparadas se elaboraron especímenes cilíndricos de 150 mm x 300 mm. La evaluación de las propiedades mecánicas y físicas de los especímenes cilíndricos mostró que los materiales con mayor contenido de residuos de llantas presentaron una menor densidad, mientras que los de mayor contenido de microesferas presentaron la mayor resistencia a la compresión; de hecho, las mezclas 0:1 y 1:3 presentaron resistencias a la compresión de 22.4 y 19.1 MPa, respectivamente. Los resultados encontrados muestran que la adición conjunta de microesferas y residuos de llantas presentan un efecto sinérgico combinado entre los dos materiales con potencial uso en la industria de la construcción, en reemplazo de los materiales tradicionales utilizados en la elaboración de concretos, en particular, se espera que el uso de estos materiales se convierta en una alternativa para la utilización de estos residuos, los cuales no cuentan actualmente con un plan de disposición.

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Section: Caracterización De Los Materialesunclassified

Evaluación de las propiedades mecánicas de concretos modificados con microesferas de vidrio y residuos de llantas

2019

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“…The structure of HGMs allows the material to offer high‐compressive strength and low weight. It can thus increase the compressive strength and reduce the density of the overall mixture …”

Section: Introductionmentioning

confidence: 99%

Development of strain‐hardening lightweight engineered cementitious composites using hollow glass microspheres

Aslani

Wang

2019

Structural Concrete

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Hollow glass microsphere (HGM) is a kind of ultra-lightweight inorganic nonmetallic material with hollow structure, and it is a versatile and high-performance new lightweight material developed in recent years. HGMs comprising at least 45 wt% of recycled glass based on the total weight of a feed composition from which the hollow microspheres are derived. The purpose of this study is to develop high-performance lightweight engineered cementitious composites (LWECCs) using efficiently waste recycled HGMs as a lightweight filler substitute for sustainable construction. LWECC is a flowable type of lightweight fiber-reinforced concrete, which is able to illustrate strain-hardening behaviors rather than tension softening after an initial crack and possesses a tensile strain up to 6%; however, available lightweight fillers in LWECC exhibit more brittle behavior compared with normal weight engineered cementitious composite. In this study, three different types of HGMs are used as lightweight fillers with 0.25, 0.40, and 0.60 g/cm 3 densities, and their effects on fresh and mechanical properties of LWECC have been investigated. HGMs fillers are replaced at 40 and 60% weight of fly ash in the control mix. To evaluate the strength of the LWECC, samples were cured for periods of 7 and 28 days and then tested for mechanical properties by compression test and three-point bending. Furthermore, the scanning electron microscopy, energy dispersive X-ray spectroscopy and morphological observations to confirm the dispersion of the lightweight filler have been captured. K E Y W O R D S

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“…These systems can be created with or without an additional layer of effective thermal insulation. As known, to ensure the thermal homogeneity of such structures, lightweight masonry mortars (dry mixes) are used, whose properties -medium density, thermal conductivity, strength should be in accordance with the basic material of the wall (Table 1) [1][2].…”

Section: Introductionmentioning

confidence: 99%

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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Properties of Light-weight Extruded Concrete with Hollow Glass Microspheres

Cited by 34 publications

References 4 publications

Evaluación de las propiedades mecánicas de concretos modificados con microesferas de vidrio y residuos de llantas

Evaluación de las propiedades mecánicas de concretos modificados con microesferas de vidrio y residuos de llantas

Development of strain‐hardening lightweight engineered cementitious composites using hollow glass microspheres

Properties of lightweight dry masonry mixtures for winter conditions

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