scholarly journals Impact of Nanosilica in Ordinary Portland Cement Over Its Durability and Properties

2021 ◽  
Author(s):  
Gude Reddy Babu ◽  
Pala Gireesh Kumar ◽  
Nelluru Venkata Ramana ◽  
Bhumireddy Madhusudana Reddy
Keyword(s):  
Compressive Strength ◽  
Electron Microscope ◽  
Flexural Strength ◽  
Scanning Electron Microscope ◽  
Ordinary Portland Cement ◽  
Cement Mortar ◽  
X Ray Diffraction ◽  
Cement Strength ◽  
The Impact ◽  
Scanning Electron

The present examination illustrates the impact on the hardened and fresh cement mortar and cement with the inclusion of nanosilica of size 40 nm in various environmental conditions (UltraTech, India). It is quite notified that an elevation in compressive strength as well as flexural strength along with an improvisation in the performance and life span of cement mortar. The samples of M5 grade blended with a ninety percentage of concrete and remaining with nanosilica was identified to have a finer working elevation in as well as in standards when collated with the conventional cement mortar. The corollary of hardened and fresh cement, strength parameters were looked upon with the aid of XRD (X-ray Diffraction). Also, the SEM (Scanning Electron Microscope) test holds a predominant role in analysis.

Research on the Insulation Materials with Sugar Filter Mud as Pore-Forming Agent and Jilin Clay as Aggregate

2013 ◽  
Vol 361-363 ◽  
pp. 682-685
Author(s):  
Chao Qian ◽  
Wen Yuan Gao ◽  
Chun Yuan Luo ◽  
Li Dong Tuo ◽  
Hai Yuan Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electron Microscope ◽  
Flexural Strength ◽  
Scanning Electron Microscope ◽  
Elemental Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Insulation Materials ◽  
Filter Mud ◽  
Scanning Electron

Insulation materials with flexural strength 5.238 MPa and porosity 39.24% obtained at 1050 °C for 0.5 h show that its bulk density of the materials decreased down to 1.252 g/cm3using clay as aggregate. Due to change the amount of sugar filter mud, the porosity arises from 37.07% to 39.24% and the thermal conductivity decreases from 0.086 to 0.052 W·m-1·K-1. The clay and wastes were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and chemical elemental analysis. The main crystalline phases of sample observed by XRD are quartz, mullite and anorthite. The insulation materials were manufactured from clay and the optimal proportion of wastes.

scholarly journals The Filler Effect on Compressive Strength of Sulfur Concrete

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Wenwei Lin ◽  
Fan Fei ◽  
Qunjie Li
Keyword(s):  
Compressive Strength ◽  
Electron Microscope ◽  
Fly Ash ◽  
Scanning Electron Microscope ◽  
Chemical Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Compressive Performance ◽  
Bonding Mode ◽  
Scanning Electron

The sulfur concrete samples were prepared by the optimized process, which were mixed with cement, fly ash and slag, respectively. The influence of the type and content of filler on the compressive strength of sulfur concrete was studied. The phase and micromorphology of filler and sulfur mixture were characterized by X-ray diffraction and scanning electron microscope, and the bonding mode was studied. The results show: the cement filler has the best effect on the compressive performance of sulfur concrete,and the compressive strength is 87.2 MPa by adding cement filler with the same quality as sulfur; there is no chemical reaction between filler and sulfur, and the filler is physically bonded to sulfur matrix.

scholarly journals Studi Material Tanah Longsor Akibat Gempa Lombok 2018

Teras Jurnal ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 235
Author(s):  
Muhammad Nurjati Hidayat
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Volcanic Eruptions ◽  
Silty Sand ◽  
Small Scale ◽  
X Ray Diffraction ◽  
Mineralogical Analysis ◽  
X Ray ◽  
The Impact ◽  
Scanning Electron

<p align="center"><strong>Abstrak</strong></p><p> </p><p class="11daftarpustaka">Pada umumnya, tanah longsor terjadi dengan skala yang kecil dan dampak yang dihasilkan tidak parah sebagaimana letusan gunung berapi, gempa atau tsunami. Namun, perhatian terhadap bencana ini seringkali diabaikan oleh masyarakat dan perencanaan pembangunan kota. Ada beberapa faktor yang perlu diperhatikan dalam meneliti tanah longor, salah satunya adalah mineral tanah. Dalam studi ini, sampel tanah diambil dari Lombok Utara akibat dari gempa Lombok 2018. Penelitian ini dilakukan dengan mengelompokkan tanah berdasarkan USCS dan AASTHO, kemudian dilanjutkan dengan analisis mineralogi menggunakan XRD (X-Ray Diffraction) dan SEM (Scanning Electron Microscope). Berdasarkan klasifikasi USCS, tanah termasuk kategori pasir berlanau dan campuran lanau (SM); dan lempung anorganik dengan plastisitas rendah sampai sedang, lempung berkerikil, lempung berpasir, lempung berlanau, lempung kurus (lean clays). Pada klasifikasi AASHTOO, hasilnya adalah tanah berlanau (A-4); kerikil dan pasir yang berlanau atau berlempung (A-2-4); dan pasir halus (A-3). Berdasarkan hasil mineralogi menggunakan XRD dan SEM, material utama pada sampel tanah adalah Albite Calcian, Microline and Kuarsa.</p><p class="11daftarpustaka"> </p><p class="11daftarpustaka">Kata kunci: <em>longsor,</em><em> mineralogi, XRD, SEM</em><em></em></p><p align="center"><strong> </strong></p><p align="center"><strong> </strong></p><p align="center"><strong>Abstract</strong></p><p class="11daftarpustaka"> </p><p class="11daftarpustaka">Landslides generally occur on a small scale and the impact is not as severe as volcanic eruptions, earthquakes, or tsunamis. However, attention to these disasters is often ignored by the community and city development planning. In assessing the factors causing landslides there are many factors that need to be considered, one of which is soil minerals. The samples of soil in this study were taken from North Lombok as a result of the 2018 earthquake. This research is conducted by classifying the soil based on USCS and AASHTO, then proceed with mineralogical analysis using XRD (X-Ray Diffraction) and SEM (Scanning Electron Microscope). Based on USCS classification, the result of the analysis shows that soil samples have a classification of silty sand, and silt mixtures (SM); and inorganic clays or low to medium plasticity, gravelly clays, sandy clays, silty clays, lean clays (CL). For AASHTO classification, the result shows the sample belong to silty soil (A-4), silty or clayey gravel sand (A-2-4) and fine sand (A-3). Based on the results of mineralogical analysis using XRD and SEM, it is known that the dominant minerals making up the soil in the sample are Albite Calcian, Microline and Quartz</p><p class="11daftarpustaka"> </p><p class="11daftarpustaka">Keywords: <em>landslide, mineralogy, XRD, SEM</em><em></em></p><em></em><em></em>

The Impact of Lithium Polysilicate on the Microstructure of Sand-Lime Products

2011 ◽  
Vol 250-253 ◽  
pp. 718-721 ◽  
Author(s):  
Ryszard Dachowski ◽  
Zdzislawa Owsiak
Keyword(s):  
Compressive Strength ◽  
Phase Composition ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Calcium Silicate ◽  
The Impact ◽  
Scanning Electron

The general attributes of calcium silicate products have been investigated in several studies. In this paper, we propose to use a specific modifier i.e. lithium polysilicate solution in order to examine and improve compressive strength of sand-lime bricks. The research was examined by scanning electron microscope (SEM). The main objective was to determine the phase composition in the structure of the sand-lime products.

Utilization of Desulfuration Residues in Non-Autoclaved Aerated Concrete

2011 ◽  
Vol 250-253 ◽  
pp. 707-710
Author(s):  
Fang Xian Li ◽  
You Zhi Chen ◽  
Qi Jun Yu ◽  
Jiang Xiong Wei
Keyword(s):  
Compressive Strength ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Bulk Density ◽  
Hydration Products ◽  
X Ray Diffraction ◽  
X Ray ◽  
Autoclaved Aerated Concrete ◽  
Aerated Concrete ◽  
Scanning Electron

Desulfuration residues were used as aggregate to produce Non-autoclaved aerated concrete. The effects of water-hinder ratio, casting temperature on the gas forming behavior, and those of desulfuration residue content on the compressive strength and bulk density of aerated concrete were investigated. The types of the hydration products and the microstructure of Non-autoclaved aerated concrete with desulfuration residue were investigated by means of X-ray diffraction and scanning electron microscope. Results show that the optimum replacement amount was determined as 50% and at this rate the compressive strength, bulk density of Non-autoclaved aerated concrete were measured as 2.83 MPa and 543 kg/m3. The hydration products of Non-autoclaved aerated concrete with desulfuration residue are C2SH (A) and C2SH (B) along with ettringite and hydrogarnet phases.

scholarly journals Development of Alkaline-Activated Self-Leveling Hybrid Mortar Ash-Based Composites

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1829 ◽  
Author(s):  
Luís Tambara Júnior ◽  
Malik Cheriaf ◽  
Janaíde Rocha
Keyword(s):  
Compressive Strength ◽  
Electron Microscope ◽  
Flexural Strength ◽  
Ordinary Portland Cement ◽  
Rice Husk Ash ◽  
Bottom Ash ◽  
X Ray ◽  
Dimensional Changes ◽  
Alkali Activated ◽  
Scanning Electron

This study investigated the reactivity properties of self-leveling hybrid alkali-activated cements, such as ordinary Portland cement (OPC) and its residual precursors, coal bottom ash (BA), and rice husk ash (RHA). Due to the relatively low reactivity of BA, binary mixes were produced with OPC using contents of 2.5–30% in the treated BA samples. Furthermore, ternary mixes were prepared in proportions of 25%, 50%, and 75% with RHA as a replacement material for the OPC (mix with 90%:10% BA:OPC). For all of the mixes the spreading behaviors were fixed to obtain a self-levelling mortar, and dimensional changes, such as curling and shrinkage, were performed. Mortars with 30% OPC reached a compressive strength of 33.5 MPa and flexural strength of 7.53 MPa. A scanning electron microscope (SEM) and X-ray powder diffraction (XRD) were used to indicate the formation of N-A-S-H and a (N,C)-A-S-H gel, similar to the gel with trace of calcium. The best performance was achieved when the binary mix produced 10% OPC. A hybrid mortar of OPS-BA presented 10 times lower susceptibility to curling than an OPC mortar. The results showed that both ashes reduced the shrinkage and curling phenomena.

The Preparation and Micro Mechanism of Brick Materials with Iron Tailings in Tanshang Area

2013 ◽  
Vol 753-755 ◽  
pp. 572-575
Author(s):  
Shu Xian Liu ◽  
Shao Bo Wei
Keyword(s):  
Compressive Strength ◽  
Electron Microscope ◽  
Fly Ash ◽  
Flexural Strength ◽  
Scanning Electron Microscope ◽  
Steam Curing ◽  
X Ray ◽  
A New Technique ◽  
Scanning Electron

This paper discussed the experimental results of exploiting brick materials with iron tailing materials in Tanshang area. Through preparation of iron tailing bricks, the technical flow and production proportion was obtained. The results show that a burning-and steam curing-free brick product with a compressive strength of 28.30 MPa and Flexural strength of 5.63 MPa as the following: iron tailing; fly ash; sand; CaO; gypsum; cement. And long-term properties of a burning-and steam curing-free brick is also studied by experiments in this paper. Put forward a new technique of making materials with iron tailing. At the same time, the micro mechanism of iron tailing brick was also studied with X-Ray Diffractometer (XRD) and Scanning Electron Microscope (SEM).

Influence of Nano-SiO2 on the Strength of High Performance Concrete

2011 ◽  
Vol 686 ◽  
pp. 432-437 ◽  
Author(s):  
Bao Min Wang
Keyword(s):  
Compressive Strength ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
High Performance ◽  
High Performance Concrete ◽  
Mixing Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Injection Experiment ◽  
Scanning Electron

The influence of Nano-SiO2 (NS) on the strength of high-performance concrete (W/B=0.24, W/B=0.29, W/B=0.34) has been studied in this paper. The results show that compressive strengths of concrete in both the early and later stage can be improved by adding Nano-SiO2 content. And the influence on the early compressive strength is greater than that on the later compressive strength. According to the results, 3%-5% Nano-SiO2can be used as the proper mixing ratio. X-ray diffraction, SEM (scanning electron microscope) and mercury injection experiment were used to analyze the action principle of Nano-SiO2 microscopically, the microscopic characteristics of concrete can be significantly improved through interfacial and filling effect effects so that the performance of concrete can be accordingly improved.

PENGGUNAAN TiO2 PARTIKEL NANO HASIL SINTESIS BERBASIS AIR MENGGUNAKAN METODA SOL-GEL PADA BAHAN KAPAS SEBAGAI APLIKASI UNTUK TEKSTIL ANTI UV

Arena Tekstil ◽  
2013 ◽  
Vol 28 (1) ◽  
Author(s):  
Maya Komalasari ◽  
Bambang Sunendar
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sol Gel ◽  
Crosslinking Agent ◽  
X Ray Diffraction ◽  
Nano Tio2 ◽  
X Ray ◽  
Infra Red ◽  
Scanning Electron

Partikel nano TiO2 berbasis air dengan pH basa telah berhasil disintesis dengan menggunakan metode sol-gel dan diimobilisasi pada kain kapas dengan menggunakan kitosan sebagai zat pengikat silang. Sintesis dilakukan  dengan prekursor TiCl4 pada konsentrasi 0,3 M, 0,5 M dan 1 M, dan menggunakan templat kanji dengan proses kalsinasi pada suhu 500˚C selama 2 jam. Partikel nano TiO2 diaplikasikan ke kain kapas dengan metoda pad-dry-cure dan menggunakan kitosan sebagai crosslinking agent. Berdasarkan hasil Scanning Electron Microscope (SEM),diketahui bahwa morfologi partikel TiO2 berbentuk spherical dengan ukuran nano (kurang dari 100 nm). Karakterisasi X-Ray Diffraction (XRD) menunjukkan adanya tiga tipe struktur kristal utama, yaitu (100), (101) dan (102) dengan fasa kristal yang terbentuk adalah anatase dan rutile. Pada karakterisasi menggunakan SEM terhadap serbuk dari TiO2 yang telah diaplikasikan ke permukaan kain kapas, terlihat adanya imobilisasi partikel nano TiO2 melalui ikatan hidrogen silang dengan kitosan pada kain kapas. Hasil analisa tersebut kemudian dikonfirmasi dengan FTIR (Fourier Transform Infra Red) yang hasilnya memperlihatkan puncak serapan pada bilangan gelombang 3495 cm-1, 2546 cm-1, dan 511 cm-1,  yang masing-masing diasumsikan sebagai adanya vibrasi gugus fungsi O-H, N-H dan Ti-O-Ti. Hasil SEM menunjukkan pula bahwa kristal nano yang terbentuk diantaranya adalah fasa rutile , yang berdasarkan literatur terbukti dapatberfungsi sebagai anti UV.

Effect of the Neodymium Content on Mechanical Properties of the Electro-Brush Plated Nano-Al2O3/Ni Composite Coating

2012 ◽  
Vol 525-526 ◽  
pp. 277-280
Author(s):  
Guo Jin ◽  
Xiu Fang Cui ◽  
Er Bao Liu ◽  
Qing Fen Li
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Composite Coating ◽  
Nanoindentation Test ◽  
X Ray Diffraction ◽  
X Ray ◽  
Small Cracks ◽  
Scanning Electron

The effect of the neodymium content on mechanical properties of the electro-brush plated nanoAl2O3/Ni composite coating was investigated in this paper. The microstructure and phase structure were studied with scanning electron microscope (SEM) and X-ray diffraction (XRD). The hardness and abrasion properties of several coatings with different neodymium content were studied by nanoindentation test and friction / wear experiment. Results show that the coatings are much finer and more compact when the neodymium was added, and the hardness and abrasion property of the coatings with neodymium were improved obviously. Besides, the small cracks conduced by the upgrowth stress in the coatings were ameliorated when the rare earth neodymium was added. The improvement mechanism was further discussed.

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