The effects of mixture’s components on the mechanical properties and durability indicators of mixed mortar using simplex network method

At present, masonry and plaster of AAC blocks are still carried out by traditional construction methods which often lead to some quality defects such as cracking and leaking in the wall and hollowing and spalling in the plaster layer, etc. and hinder greatly the popularization and application of AAC blocks. On the basis of the characteristics of AAC blocks and the dry masonry thin-bed mortar, a kind of high performance dry-mixed Mortar for dry masonry process of AAC blocks was developed. The mortar has excellent workability, high water-retention, property, good mechanical properties and good construction properties. It solves the problems caused by traditional construction methods. The mechanism for these is discussed.

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Prediction of TC16 Alloy Deformation Behavior Based on BP Neural Network

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.850-851.96 ◽

2013 ◽

Vol 850-851 ◽

pp. 96-101

Author(s):

Chuan Dong Song ◽

Jian Kong ◽

Lin Che

Keyword(s):

Neural Network ◽

Experimental Data ◽

Mechanical Properties ◽

Neural Network Model ◽

Bp Neural Network ◽

Deformation Behavior ◽

Prediction Errors ◽

Quenching Temperature ◽

Network Method ◽

Bp Neural Network Model

Based on the theory and algorithm of BP neural network, the deformation behavior of TC16 titanium alloys is studied under different quenching temperature. Mechanical properties of TC16 were measured by tensile experiments and use the BP neural network model to train and simulate the experimental data. Results show that using the BP neural network method can get high calculation accuracy and the prediction errors are around 5%.This method is suitable for further research of TC16 alloy.

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Rational Proportion For Mixture Of Foamed Concrete Design

Jurnal Teknologi ◽

10.11113/jt.v55.73 ◽

2011 ◽

Cited By ~ 1

Author(s):

Fahrizal Zulkarnain ◽

Mahyuddin Ramli

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Silica Fume ◽

Mineral Admixture ◽

Concrete Mixture ◽

Foam Concrete ◽

Foamed Concrete ◽

Mixed Mortar ◽

And Control ◽

Lightweight Foam

Kajian ini membentangkan sebahagian hasil kerja makmal untuk reka bentuk konkrit ringan berbusa dengan Protein Agent 1 sebagai busa, silica fume (SF) sebagai bahan tambah dan superplasticizer (SP). Konkrit ringan berbusa terkawal dicampurkan dengan kandungan simen Portland biasa (OPC) dan silica fume, campuran tersebut pada kadar 10 peratus, dari berat simen sebagai bahan tambah akan disediakan. Silica fume digunakan untuk meningkatkan kekuatan mampat dan juga menjimatkan kos. Konkrit berbusa diawetkan pada kisaran 70 peratus kelembapan dan 28 darjah kandungan udara. Sifat mekanikal daripada struktur konkrit ringan berbusa juga didedahkan. Dapatan kajian menunjukkan bahawa serapan air dalam kajian besar adanya. Walaupun demikian, silica fume perlu digunakan untuk menghasilkan struktur ringan berbusa yang murah dan mesra alam, dengan kekuatan mampat dan kawalan struktur ringan berbusa menggunakan simen Portland biasa (OPC) sahaja. Kata kunci: Campuran konkrit berbusa; ketumpatan mortar; ketumpatan sebenar; sifat mekanikal; kekuatan mampat This paper presents part of the results of laboratory work to design a lightweight foamed concrete made with Protein Agent 1 as foam, silica fume (SF) mineral admixture and superplasticizer (SP). Control of foamed concrete mixture made with foam containing only Ordinary Portland Cement (OPC) and SF, lightweight foam concrete mixture containing 10% of SF as a replacement for the cement in weight basis was prepared. SF is used to increase the compressive strength and for economical concerns. The foam concrete was cured at 70% relative humidity and ± 28°C temperature. The mechanical properties of a lightweight foam concrete with OPC are presented. The findings indicate that water absorption of aggregate is large in this case. However, the use of SF seems to be necessary for the production of cheaper and environmentfriendly structural foamed concrete with compressive strength and control structural foamed concrete containing only OPC. Key words: Foam concrete mixed; mortar density; actual density; mechanical properties; compressive strength

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Effects of Chemical Admixtures on the Working and Mechanical Properties of Ordinary Dry-Mixed Mortar

Advances in Materials Science and Engineering ◽

10.1155/2019/5978089 ◽

2019 ◽

Vol 2019 ◽

pp. 1-10

Author(s):

Shu-Chun Zhou ◽

Heng-Lin Lv ◽

Ning Li ◽

Jie Zhang

Keyword(s):

Mechanical Properties ◽

Water Retention ◽

Cement Mortar ◽

Setting Time ◽

Methyl Cellulose ◽

Cellulose Ether ◽

Hydroxypropyl Methyl Cellulose ◽

Chemical Admixtures ◽

Retarding Effect ◽

Mixed Mortar

The effects of hydroxypropyl methyl cellulose ether, starch ether, bentonite, and redispersion emulsoid powder on the working and mechanical properties of fresh dry-mixed mortar were studied. The results show that hydroxypropyl methyl cellulose ether has the greatest impact on the consistency and water retention of ordinary dry-mixed mortar and that redispersion emulsoid powder reduces the water action and starch ether has essentially no effect on water retention. It also shows that the time of mortar condensation when mixed with hydroxypropyl methyl cellulose ether is the longest, followed by redispersion emulsoid powder and bentonite. Starch ether can slightly, but not obviously, extend the setting time of cement mortar. Hydroxypropyl methyl cellulose ether has the greatest impact on the mechanical properties of ordinary dry-mixed mortar, followed by redispersion emulsoid powder, starch ether, and bentonite. As the water retention increases, the setting time of the mortar also increases. The use of water as a thickening material has a retarding effect on the mortar, increases the water-retention rate, and increases the retarding effect. Moreover, increasing the content of the chemical admixtures decreases the strength of cement mortar.

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Addition of Dregs in Mixed Mortar: Evaluation of Physical and Mechanical Properties

The Minerals, Metals & Materials Series - Characterization of Minerals, Metals, and Materials 2018 ◽

10.1007/978-3-319-72484-3_44 ◽

2018 ◽

pp. 419-427

Author(s):

Rodrigo Felipe Santos ◽

Rita de Cássia Silva Sant’ana Alvarenga ◽

Beatryz Mendes ◽

José Maria Carvalho ◽

Leonardo Pedroti ◽

...

Keyword(s):

Mechanical Properties ◽

Physical And Mechanical Properties ◽

Mixed Mortar

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Study of the Properties of Full Component Recycled Dry-Mixed Masonry Mortar and Concrete Prepared from Construction Solid Waste

Sustainability ◽

10.3390/su13158385 ◽

2021 ◽

Vol 13 (15) ◽

pp. 8385

Author(s):

Zhenwen Hu ◽

Zhe Kong ◽

Guisheng Cai ◽

Qiuyi Li ◽

Yuanxin Guo ◽

...

Keyword(s):

Mechanical Properties ◽

Solid Waste ◽

Coarse Aggregate ◽

Recycled Concrete ◽

Fine Aggregate ◽

Replacement Rate ◽

Substitution Rates ◽

Natural Aggregate ◽

Mixed Mortar ◽

Masonry Mortar

Solutions are needed to solve the problem of a large amount of construction solid waste and a shortage of natural aggregate (coarse and fine aggregates). In this paper, simple-crushed coarse aggregate (SCRCA) and simple-crushed fine aggregate (SCRFA) were obtained by simple-crushing of construction solid waste. On this basis, SCRCA and SCRFA were treated with particle-shaping to obtain particle-shaping coarse aggregate (PSRCA) and particle-shaping fine aggregate (PSRFA), and the recycled powder (RP) produced in the process of particle-shaping was collected. Under the condition of a 1:4 cement-sand ratio, RP was used to replace cement with four substitution rates of 0, 10%, 20%, and 30%, and dry-mixed masonry mortar was prepared with 100% SCRFA, PSRFA, and river sand (RS). The basic and mechanical properties and microstructure of hydration products of dry-mixed mortar were analyzed, and the maximum substitution rate of RP was determined. Under the condition that the amount of cementitious material is 400 kg/m3 and the RP is at the maximum replacement rate, three different aggregate combinations to prepare concrete are the 100% use of SCRCA and SCRFA, PSRCA and PSRFA, and RS and natural aggregate (NCA); the workability, mechanical properties, and aggregate interface transition zone of the prepared concrete were analyzed. The results show that when the replacement rate of RP is less than 20%, it has little effect on the properties of products. The performance of PSRCA and PSRFA after treatment is better than that of SCRCA and SCRFA. Under different RP substitution rates, the performance of dry-mixed mortar prepared with PSRFA is very close to that prepared with RS. The performance of recycled concrete prepared with PSRCA and PSRFA is also very close to that of products prepared with NCA and RS. The failure morphology of PSRCA and RSRFA concrete is also similar to that of NCA and RS concrete.

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Improvement of the Mechanical Properties for CO2 Reducing Mortar Using Porous Feldspar and Hydrogen Nano-Bubble Water

Science of Advanced Materials ◽

10.1166/sam.2021.3988 ◽

2021 ◽

Vol 13 (7) ◽

pp. 1289-1294

Author(s):

Jin Kim ◽

Young-Ho Kim ◽

Jong-Young Lee ◽

Jung-Geun Han

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Compressive Strength ◽

Thermal Efficiency ◽

Cement Content ◽

Construction Materials ◽

Modern Society ◽

Plain Water ◽

Fine Aggregate ◽

Mixed Mortar

ABSTRACTThe modern society is a world made of concrete. Many buildings, ports, dams, and other infrastructure are made of concrete. Concrete is mainly composed of aggregate and cement. It is mixed with blended water and used after curing. This study used porous feldspar known to react well with cement to replace fine aggregate and reduce cement content. Although feldspar mortar reduced cement content by 5% (25%–>20%), the compressive strength increased 1.4 to 2.9 times compared to its counterpart, Ready-Mixed Mortar (RMM). Using Hydrogen Nano-Bubble Water (HNBW) as blended water, compressive strength was increased from 7% to a maximum of 23%. This proved that hydrogen nano-bubble water could promote cement hydrate creation and reaction. When hydrogen nano-bubble water was used as blended water, thermal conductivity decreased by a maximum of 30% compared to the use of plain water as blended water. Results of this study indicate that construction materials with improved thermal efficiency could be developed.

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