Determination of CaCO3 and SiO2 content in the binders of historic lime mortars

Sağın, Elif Uğurlu; Böke, Hasan; Aras, Nadir; Yalçın, Şerife

doi:10.1617/s11527-011-9802-1

Cited by 21 publications

(4 citation statements)

References 24 publications

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“…About 15 to 30% of the waste is generated from the bricks and tile industry. Sağın, Böke, Aras, & Yalçın (2012) state that ceramic materials like crushed tiles are artificial pozzolans. The specific gravity of ceramic wastes has been reported in the range of 2.27 to 2.82 by various investigators (Kamala & Rao, 2012;Sabat, 2012;Sekar, Ganesan, & Nampoothiri, 2011;Tavakoli et al, 2013;Veera Reddy, 2010).…”

Section: State Of the Artmentioning

confidence: 99%

Strength and microstructure of micro ceramic dust admixed lime stabilized soil

James¹,

Pandian²

2018

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The use of micro ceramic dust (CD) as an additive to lime in soil stabilization has been analysed in this study. CD was obtained by crushing and sieving of waste ceramic tiles from construction debris. The initial consumption of lime (ICL) for soil modification was determined using Eades and Grim pH test. In order to study the effect of lime content on soil stabilization, three different lime contents (below ICL, ICL and above ICL) were used for stabilizing the soil. These three lime contents were amended with various amounts of CD to study its effect on the strength of the stabilized soil. Unconfined compression strength (UCS) tests were carried out on the stabilized soil specimens of dimensions 38mm x 76mm at different ages of curing. The spent UCS samples were crushed and sieved to carry out Atterberg limits and free swell tests followed by x-ray diffraction (XRD) and scanning electron microscopy (SEM) tests for determining changes in microstructure. The results indicated that the addition of CD resulted in a marginally negative influence on the early strength of the stabilized soil at three days of curing whereas it enhanced the delayed strength of the soil at 28 days of curing, gaining between 12-14% strength. The effect of CD on the plasticity and swell-shrink of lime stabilized soil indicated a further reduction in plasticity and swell-shrink nature. The mineralogy of the amended soil revealed the formation of CSH and CAH minerals responsible for strength gain. SEM images used to analyse the microstructure of the virgin and stabilized soil, indicated the formation of a dense and compact microstructure. Finally, it was concluded that CD can be adopted as an auxiliary additive to lime in stabilization of expansive soil with provision of sufficient curing and the delayed onset of early strength due to CD can be overcome by using higher lime content in stabilization.Key words: Expansive soil, lime stabilization, ceramic dust, strength, mineralogy, microstructure Resumen El uso de polvo de cerámica micro (CD) como un aditivo a la cal en la estabilización del suelo se ha analizado en este estudio. El CD se obtuvo triturando y tamizando las baldosas cerámicas de desecho de los desechos de la construcción. El consumo inicial de cal (ICL) para la modificación del suelo se determinó usando Eades y Grim pH test. Con el fin de estudiar el efecto del contenido de cal sobre la estabilización del suelo, se utilizaron tres contenidos diferentes de cal (por debajo de ICL, ICL y superior ICL) para estabilizar el suelo. Estos tres contenidos de cal fueron modificados con varias cantidades de CD para estudiar su efecto sobre la resistencia del suelo estabilizado. Se realizaron pruebas de resistencia a la compresión no confinada (UCS) en las muestras de suelo estabilizado de dimensiones 38 mm x 76 mm a diferentes edades de curado. Las muestras de UCS gastadas se trituraron y se tamizaron para llevar a cabo los límites de Atterberg y las pruebas de hinchamiento libre seguidas por difracción de rayos X (XRD) y microscop...

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Section: State Of the Artmentioning

confidence: 99%

Strength and microstructure of micro ceramic dust admixed lime stabilized soil

James¹,

Pandian²

2018

rdlc

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“…The rock materials exhibited peaks typical of carbonate materials containing some quartz or silica impurities. The band at around 1200-900 cm -1 , ascribable to Si-O and Si-O-Si vibrations (Madejová 2003, Sağın et al 2012, Sdiri et al 2010, evidences the presence of quartz/silica. Several researchers have studied and employed FTIR analysis as a rapid technique for identifying dolomite (Boggs Jr and Boggs 2009, Jovanovski et al 2002, Stanienda-Pilecki 2019.…”

Section: Carbonate Rock Mineralogical Analysis By Fourier Transform I...mentioning

confidence: 97%

Synthesis and FTIR Characterization of Mg-Hydroxylapatite Derived from Dolostone with High Dolomite Mineral Content

Mahene,

Gervas,

Hilonga

et al. 2020

Tanz. J. Sci.

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We present the synthesis of magnesium-substituted hydroxylapatite starting from locally available dolostone. The apatite was prepared by a reaction between heat pre-treated dolostone powder with phosphoric acid, maintained at the pH of 12.5 using sodium hydroxide. The resultant material was then calcined at 500 °C, 600 °C, 700 °C, 800 °C and 900 °C. The precursor dolostone was characterized by organic elemental analyser (CHNS-O analyser), X-ray fluorescence (XRF) and Fourier transform infrared spectroscopy (FTIR), while the synthesized material was characterized by using FTIR. Results indicated that the dominant mineral in the carbonate rock materials was near-stoichiometric dolomite, while the synthesized material was found to be (carbonate, magnesium)-substituted hydroxylapatite. The synthesized material did not exhibit hydroxylapatite diagnostic peaks until after being calcined at 600 °C. The peaks became more distinct with increase in calcination temperature. The prepared material exhibited a low degree of crystallinity and low conversion temperature to beta-tricalcium phosphate, 700–800 °C. These characteristics are typical of a magnesium-substituted hydroxylapatite (Mg-substituted β-tricalcium phosphate). This work has demonstrated the feasibility of synthesizing magnesium-substituted hydroxylapatite (Mg-HA), with potential applications in water purification, using dolostone as a calcium/magnesium source. Keywords: Dolostone; crystallinity; magnesium-substituted hydroxylapatite; magnesium-substituted beta-tricalcium phosphate;

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“…A possible solution for these challenges may be found in the use of historical building materials, which tended to be more environmentally friendly, durable, and sustainable. Historically, lime-based mortar was widely used in ancient Greece [ 1 , 2 , 3 , 4 , 5 , 6 ], and pozzolan-based hydraulic materials [ 3 , 6 ] were extensively used in Europe and Western Asia until the invention of modern Portland cement in the 19th century in the UK. In ancient China, lime was also produced for construction as a building material about 5000 years ago [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Nanoindentation Characterization of a Ternary Clay-Based Composite Used in Ancient Chinese Construction

et al. 2016

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Ternary clay-based composite material (TCC), composed of lime, clay and sand, and usually modified with sticky rice and other organic compounds as additives, was widely used historically in Chinese construction and buildings due to its high mechanical performance. In this study, to gain an insight into the micromechanical mechanism of this cementitious material, the nanomechanical properties and volume fraction of mechanically different phases of the binder matrix are derived from the analysis of grid nanoindentation tests. Results show that there are five distinct mechanical phases, where the calcium silicate hydrate (C-S-H) and geopolymer present in the binder matrix are almost identical to those produced in ordinary Portland cement (OPC) and alkali-activated fly-ash geopolymer materials in nano-mechanical performance. The nano-mechanical behavior of calcite produced by the carbonation of lime in this binder is close to the calcite porous outer part of some sea urchin shells. Compared to OPC, the C-S-H contained in the TCC has a relatively lower ratio of indentation modulus to indentation hardness, implying a relatively lower resistance to material fracture. However, the geopolymer and calcite, at nearly the same volume content as the C-S-H, help to enhance the strength and durability of the TCC by their higher energy resistance capacity or higher strength compared to the C-S-H. Rediscovering of TCC offers a potential way to improve modern concrete’s strength and durability through synergy of multi-binders and the addition of organic materials if TCC can be advanced in terms of its workability and hardening rate.

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Determination of CaCO3 and SiO2 content in the binders of historic lime mortars

Cited by 21 publications

References 24 publications

Strength and microstructure of micro ceramic dust admixed lime stabilized soil

Strength and microstructure of micro ceramic dust admixed lime stabilized soil

Synthesis and FTIR Characterization of Mg-Hydroxylapatite Derived from Dolostone with High Dolomite Mineral Content

Nanoindentation Characterization of a Ternary Clay-Based Composite Used in Ancient Chinese Construction

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