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·Fine aggregate was selected as river sand from Xijiang riverbed Compos 124 2021 p 104277 View PDF View article View in Scopus Google Scholar [24] ASTM C 1202 17a Standard test method for electrical indication of concrete s ability to resist chloride ion penetration Composition and microstructure of 50 year lightweight
·lightweight concrete is widely used in the construction industry [3 4] It can be classified into two categories foamed concrete and lightweight aggregate concrete The former is composed of binder and pores produced by the use of a foaming agent in general [5 6] while the latter consists of a binder and lightweight aggregates [7 8]
·The present paper characterises the chloride penetration into a large array of structural lightweight aggregate concrete LWAC after a 5 year exposure period to aggressive marine conditions The chloride profiles chloride diffusion coefficients and surface chloride contents were determined and the influence of the main composition parameters
·Lightweight aggregate concrete mixtures incorporating 0 10 20 and 30 weight percent replacement of normal weight aggregate with lightweight aggregate and crushed stone as fine aggregate were tested at 7 28 56 and 90 days for various strength and durability characteristics of hardened concrete during the recent years the use of
·1 • Pumice concrete is proportioned mixed and placed in a similar manner as conventional sand and gravel 2 • Hess grade 3/4 x 5 1/16 MN mine —a typical aggregate grade used in lightweight insulating concrete mix 3 • Well cements made from Hess Pumice aggregates have performance advantages in strength durability elasticity
·Lightweight aggregate concrete LWAC having aggregate with a density typically less than 2000 kg/m 3 provides a number of advantages in concrete construction and is commonly specified in the floor systems of multi storey buildings in long span bridges and in some mass concrete use of LWAC is advantageous in terms of seismic
·Lightweight aggregate LWA is defined as solid substance with an apparent density of less than g/cm 3 and a bulk density of less than g/cm 3 are porous and often granular materials
·Figure 3 shows the correlation between D from a long term field test D field on the x axis and counterpart D from laboratory diffusion tests D lab on the left y axis and coulombs right y axis
·Caiza M Gonzalez C Toulkeridis T Bonifaz H 2018 Physical properties of pumice and its behavior as a coarse aggregate in concrete Cem Wapno Beton 6 468 478 Google Scholar Karthika RB Vidyapriya V Sri KN Beaula KMG Harini R Sriram M 2021 Experimental study on lightweight concrete using pumice aggregate
·This article presents the outcomes of a comprehensive study utilizing all natural perlite in producing lightweight aggregate concrete composites and investigating the mechanical permeability and durability properties With this aim lightweight concrete composites were produced using 10% 20% 30% 40% 50% 75% and 100% of natural perlite aggregate in
·APPLICATIONS OF LIGHTWEIGHT AGGREGATE CONCRETE p 30 —Scope and historical development p 30 —Structural efficiency of lightweight concrete p 30 —Applications of high performance lightweight concrete p 30 —Self consolidating lightweight concrete p 34 —Advantages of lightweight concrete p 35
·This study aims to determine the effect of replacing sand with pumice sand as fine aggregate in lightweight concrete The substitution affects the compressive strength split tensile strength and
·Expanded glass aggregate is the product of recycled waste glass which is treated and granulated at approximately 900 °C temperature The production of EGA involves CO 2 releasing foaming or expansion agents such as MgCO 3 CaCO 3 SiC black carbon poly methyl methacrylate added between the softening point and maximum firing temperature
·Lightweight aggregate concrete LWC has received significant attention in recent years due to its excellent performance evaluated as its high strength relative to unit weight with an apparent dry density of no more than 1950 kg/m 3 [1] Combining the characteristics of structural materials and functional materials LWC has the advantages of
·A review of the research and application progress of new types of concrete filled FRP tubular members Zhiqiang Dong Pu Zhang in Construction and Building Materials 2021 4 Lightweight aggregate concrete filled FRP tube structures Lightweight aggregate concrete LWAC refers to concrete with a dry apparent density of no more than 1950 kg/m 3 prepared
·It is possible to use lightweight concrete having a density less than 400 kg/m 3 for insulation purposes whereas structural grade concretes possess a density starting from 1600 kg/m 3 Lightweight concrete LWC is a broad term that mainly consists of aerated concrete no fines concrete and lightweight aggregate concrete LWAC
·Sand ne aggregate In the study ≤ mm grain size sand ne aggregate was used The sand was washed and cleaned and used in experi ments by drying in an oven The physical properties of the aggregate are of great importance to produce concrete with high strength and qual ity For this reason sand in the range of ≤ mm was used
·The objective of the present study is to examine the effects of different types and content of steel fibers on the workability mechanical properties and ductility enhancement of lightweight aggregate concrete LWAC Thirteen LWAC mixtures were prepared using different types of steel fibers including conventional hooked end macro steel fibers SF H straight
·Structural lightweight concrete can be produced when the lightweight concrete mixtures utilized the pumice breccia as coarse aggregate and its volume fraction range between 55% and 75% to the
·Current design methods for structural lightweight aggregate concrete SLWAC are usually only valid for a limited range of concrete compositions that have previously been subjected to trial tests The SLWAC mix design is more complex than that of normal weight concrete as more parameters need to be determined Taking this into account a simplified
In Design of concrete structures light weight concrete plays a prominent role in reducing the density and to increase the thermal insulation These may relate of both structural integrity & serviceability More environmental and economical benefits can be achieved if waste materials can be used to replace the fine light weight aggregate The new sources of Structural
·DOI / Corpus ID 233630344; Structural lightweight aggregate concrete exposed to marine environment for 5 years article{Real2021StructuralLA title={Structural lightweight aggregate concrete exposed to marine environment for 5 years} author={Sofia Real and Jos{ e} Alexandre Bogas and Jorge
·The present work focuses on enhancing the thermal properties of Light Weight Aggregate Concrete ECAC using Expanded Clay Aggregate ECA as a carrier for inorganic Phase Change Material PCM Hydrated salt 24 HS24 with melting point 24 °C for M30 grade concrete As PCM incorporation in concrete reduces mechanical properties which can be
·After 25 years of exposure to harsh tidal marine conditions on Treat Island in the coast of Eastport Maine Thomas and Bremner [16] observed similar chloride penetration behaviour in LWAC with expanded shale lightweight aggregates LWA and in NWAC of equal composition taking into account concrete blocks with a w/b of and high amount of slag
