COMPOSITE GYPSUM BINDER WITH THE MINERAL ADDITIVE OF THE OPOCAID MARGEL

2020 ◽  
Vol 88 (2) ◽  
pp. 35-43 ◽  
Author(s):  
Ye.S. GLAGOLEV ◽  
◽  
V.S. LESOVIK ◽  
N.V. CHERNYSHEVA ◽  
Ye.N. LESNICHENKO ◽  
...  
Keyword(s):  
Mineral Additive

An Investigation of Mechanical Properties and Microstructures of Mineral Additive Concrete

2017 ◽  
Author(s):  
Osman Günaydın ◽  
Kadir Güçlüer ◽  
Kubilay Akçaözoğlu
Keyword(s):  
Mechanical Properties ◽  
Mineral Additive

Mechanoactivation Of Rice Husk Ash In Laboratory Conditions

2019 ◽  
pp. 20-26
Keyword(s):  
Mechanical Activation ◽  
Rice Husk ◽  
Amorphous Silica ◽  
Silicon Oxide ◽  
Rice Husk Ash ◽  
Pozzolanic Activity ◽  
Maximum Solubility ◽  
Laboratory Conditions ◽  
Before And After ◽  
Mineral Additive

In many rice producing countries of the world, including in Vietnam, various research aimed at using rice husk ash (RHA) as a finely dispersed active mineral additive in cements, concrete and mortars are being conducted. The effect of the duration of the mechanoactivation of the RHA, produced under laboratory conditions in Vietnam, on its pozzolanic activity were investigated in this study. The composition of ash was investigated by laser granulometry and the values of indicators characterizing the dispersion of its particles before and after mechanical activation were established. The content of soluble amorphous silicon oxide in rice husk ash samples was determined by photocolorimetric analysis. The pizzolanic activity of the RHA, fly ash and the silica fume was also compared according to the method of absorption of the solution of the active mineral additive. It is established that the duration of the mechanical activation of rice husk ash by grinding in a vibratory mill is optimal for increasing its pozzolanic activity, since it simultaneously results in the production of the most dispersed ash particles with the highest specific surface area and maximum solubility of the amorphous silica contained in it. Longer grinding does not lead to further reduction in the size of ash particles, which can be explained by their aggregation, and also reduces the solubility of amorphous silica in an aqueous alkaline medium.

Effectiveness the use of additive MEGA-VIT in the ration of mares of Shetland pony breed

2020 ◽  
pp. 60-67
Author(s):  
G. Uskov ◽  
A. Tsopanova ◽  
T. Perezhogina
Keyword(s):  
Physiological State ◽  
Mineral Elements ◽  
Positive Influence ◽  
Control Group ◽  
Physiological Indicators ◽  
Mineral Additive ◽  
Nutritional Needs ◽  
Young Horses ◽  
The Cost ◽  
Experimental Group

Complete feeding of ponies is provided on the basis of data on their nutritional needs depending on age, sex, physiological state and level of productivity (the amount of milk produced and the intensity of growth of young animals). Ponies are sensitive to a lack of vitamins and mineral elements in the feed. When there is a sufficient amount of organic and mineral substances, but a lack or absence of vitamins, horses and ponies have impaired metabolism. The purpose of this work is to study the effectiveness of the use of vitamin and mineral additive MEGA-VIT in the rations of pregnant and lactating mares of Shetland pony breed. It has been found during of the researches that the vitamin and mineral additive MEGA-VIT had a positive influence on the productive and physiological indicators of animals. The cost of spent feed for the entire period of experiment in the control group was 50,6 thousand rubles, and in the experimental group it was 11,8 thousand rubles more or 23,5 %. Revenue from the sale of young horses of the control group amounted to 400 thousand rubles, and experimental group – 440 thousand rubles, this is by 40 thousand rubles more than in control group. This led to the increase in profit in the experimental group of mares by 28,1 thousand rubles and accordingly the level of profitability by 3,2 %. It has been recommended on the results have been obtained on the base of researches to include 30 g/head/day in the rations of mares of Shetland pony breed during pregnancy, and 50 g/head/day during lactation.

scholarly journals The Influence of Cement Substitution by Biomass Fly Ash on the Polymer–Cement Composites Properties

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3079
Author(s):  
Beata Jaworska ◽  
Dominika Stańczak ◽  
Joanna Tarańska ◽  
Jerzy Jaworski
Keyword(s):  
Fly Ash ◽  
Building Materials ◽  
Raw Materials ◽  
Combustion Process ◽  
Biomass Combustion ◽  
Cement Composites ◽  
Cement Mortars ◽  
Mineral Additive ◽  
Biomass Fly Ash

The generation of energy for the needs of the population is currently a problem. In consideration of that, the biomass combustion process has started to be implemented as a new source of energy. The dynamic increase in the use of biomass for energy generation also resulted in the formation of waste in the form of fly ash. This paper presents an efficient way to manage this troublesome material in the polymer–cement composites (PCC), which have investigated to a lesser extent. The research outlined in this article consists of the characterization of biomass fly ash (BFA) as well as PCC containing this waste. The characteristics of PCC with BFA after 3, 7, 14, and 28 days of curing were analyzed. Our main findings are that biomass fly ash is suitable as a mineral additive in polymer–cement composites. The most interesting result is that the addition of biomass fly ash did not affect the rheological properties of the polymer–cement mortars, but it especially influenced its compressive strength. Most importantly, our findings can help prevent this byproduct from being placed in landfills, prevent the mining of new raw materials, and promote the manufacture of durable building materials.

scholarly journals A Study of the Potential Use of Red Mud to Obtain Compositions Based on Portland Cement

2020 ◽  
Author(s):  
Ekaterina Gerasimova ◽  
Elizaveta Gumirova
Keyword(s):  
Portland Cement ◽  
Red Mud ◽  
Waste Product ◽  
Cement Stone ◽  
Mathematical Planning ◽  
Alumina Production ◽  
Mineral Additive ◽  
Composition Properties ◽  
Planning Of Experiments ◽  
Potential Use

The paper deals with the problem of utilization of red mud which is a waste product from alumina production using the Bayer method. The principal possible use for the red mud of JSC “Bogoslovsky aluminum plant” (Sverdlovsk region) for the compositions based on Portland cement is shown. It was found that the mud introduction accelerates beginning of the cement paste setting and thickens the paste reducing its mobility. It is concluded that the introduction of red mud up to 30 % is justified in terms of strength indicators. The work is carried out using mathematical planning of experiments. Keywords: red mud, Portland cement, active mineral additive, composition, properties, bauxite, chemical composition, cement stone strength, mathematical planning of experiments

scholarly journals Studi Penggunaan Bahan Aditif Dan Variasi Dosis Accelerator Terhadap Perkerasan Beton Yang Dipercepat (Studi Kasus Mutu Beton K-300)

2021 ◽  
Vol 13 (2) ◽  
Author(s):  
Suhaimi Suhaimi ◽  
R. Dedi Iman Kurnia
Keyword(s):  
Mix Design ◽  
Concrete Mix Design ◽  
Chemical Admixture ◽  
Concrete Mix ◽  
Mineral Additive

Penelitian ini bertujuan untuk mengetahui hasil pengujian kuat tekan awal beton kombinasi sikafume (mineral additive) dan variasi dosis penggunaan accelerator (chemical admixture). Penelitian ini menggunakan metode eksperimental. Adapun prosedur penelitian dimulai dengan studi literatur, dilanjutkan dengan persiapan material, pemeriksaan sifat fisis agregat, perencanaan campuran beton (concrete mix design), pembuatan dan perawatan benda uji, serta pengujian benda uji berupa pengujian slump dan pengujian kuat tekan serta analisis data. Berdasarkan hasil dan pembahasan penelitian terkait dengan nilai kuat tekan beton, maupun bentuk atau workability dan waktu perkerasan adalah sebagai berikut: 1) hasil uji kuat tekan beton kombinasi sikafume dengan variasi dosis penggunaan accelerator 1:2 memiliki nilai kuat tekan rata-rata sebesar 26,823 Mpa dan 31,280 Mpa untuk umur pengujian 24 dan 72 jam; 2) hasil uji kuat tekan beton kombinasi sikafume dengan variasi dosis penggunaan accelerator 1:3,5 memiliki nilai kuat tekan rata-rata sebesar 24,913 Mpa dan 30,643 Mpa untuk umur pengujian 24 dan 72 jam; 3) hasil uji kuat tekan beton kombinasi sikafume dengan variasi dosis penggunaan accelerator 1:5 memiliki nilai kuat tekan rata-rata sebesar 23,640 Mpa dan 30,325 Mpa untuk umur pengujian 24 dan 72 jam; 4) nilai slump yang diperoleh pada setiap variasi benda uji lebih besar dari yang direncanakan dalam mix design, yaitu nilai slump yang diperoleh termasuk katagori slump runtuh; dan 5) kombinasi sikafume dan variasi dosis accelerator dapat mempercepat waktu perkerasan dengan nilai kuat tekan rata-rata di atas 24,90 Mpa atau K-300 dalam waktu 24 dan 72 jam

scholarly journals Coating of Seeds with Collagen Hydrolysates from Leather Waste

2019 ◽  
Vol 27 (4(136)) ◽  
pp. 59-64 ◽  
Author(s):  
Katarzyna Ławińska ◽  
Magdalena Lasoń-Rydel ◽  
Dorota Gendaszewska ◽  
Edyta Grzesiak ◽  
Katarzyna Sieczyńska ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Growth And Yield ◽  
Collagen Hydrolysate ◽  
Drought Conditions ◽  
Different Types ◽  
Mineral Additive ◽  
Encapsulation Process ◽  
The Subject ◽  
Collagen Hydrolysates ◽  
The Impact

The subject of this paper is improvement in the growth and yield of three different types of legumes and rape in drought conditions by coating seeds with hydrolysed collagen from tanning waste. In addition, the impact of various additives in the seed shell on the growth of the plant was investigated. The encapsulation process of seeds was conducted on a disc granulator. A centrally placed seed was first coated with a layer of fungicides. The next layer was collagen hydrolysate, collagen hydrolysate with latex or a solution of yellow dextrin and polyvinyl alcohol. The outer layer was a mineral additive e.g. dolomite or kaolin. After the end of the encapsulation process on the disk granulator, all of the seeds tested were sown into soils. Seeds without coating were also sown as control seeds. Seedlings were maintained for 29 days with cultivation without irrigation. The length of the seedlings was analysed for all of the seeds sown. Higher seedling growth values were obtained for seeds coated with collagen hydrolysate in comparison with control seeds (without coating). The use of collagen hydrolysate gave slightly better results than in the case of a solution of dextrin with polyvinyl alcohol.

scholarly journals Effect of natural pozzolan on strength and temperature distribution of heavyweight concrete at early ages

2018 ◽  
Vol 193 ◽  
pp. 03024 ◽  
Author(s):  
Tang Van Lam ◽  
Trong Chuc Nguyen ◽  
Ngo Xuan Hung ◽  
Dang Van Phi ◽  
Boris Bulgakov ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Environmental Temperature ◽  
Fresh Concrete ◽  
Concrete Block ◽  
Partial Replacement ◽  
Strength Development ◽  
Natural Pozzolan ◽  
Mineral Additive ◽  
Maximum Temperatures ◽  
Heavyweight Concrete

The benefits of using mineral additive as a partial replacement for cement in heavyweight concrete are discussed. This paper presents the strength development and temperature distribution of concrete using Class F of natural pozzolan (PU) sourced from Northern part of Vietnam. Based on the results of conducted studies, strengths of the natural pozzolan concrete at different ages were generally lower than those of control concrete. The 7-day compressive strengths of concrete with 20% PU decreases mostly by 30.1% and least by 12.3% at the age of 28 days in comparison with control concrete. However, natural pozzolan increases the workability of fresh concrete up to 16.67% in comparison with control concrete. By using the computer program Midas Civil, the maximum temperatures at the center of concrete block with 100% cement and of concrete block with 80% cement + 20% PU are 65.7600C and 52.4400C, respectively, after 48 hours from the beginning of pouring. In addition, temperature difference between the central point and the environmental temperature of the control concrete are higher than heavyweight concrete using 20% PU. Meaningfully, the risk of through thermal cracking of heavyweight concrete without pozzolan are higher than heavyweight concrete PU to replace 20% of mass cement.

Milk productivity of cows, quality of milk and dairy products when using natural feed additive

2020 ◽  
pp. 13-21
Author(s):  
Yu. A. Karmatskikh ◽  
N. M. Kostomakhin
Keyword(s):  
Milk Production ◽  
Dairy Products ◽  
Feed Additive ◽  
Control Group ◽  
Black And White ◽  
Mineral Additive ◽  
Quality Of Milk ◽  
Experimental Group ◽  
Milk And Dairy Products

The organization of feeding of highly productive cows is one of the most difficult tasks in dairy cattle breeding. The purpose of the work was to study the influence of natural mineral additive on the productivity, composition and some technological qualities of milk of cows of Black-and-White breed of Ural type. Research and production experiment has been carried out in CJSC “Glinki” in the Ketovsky district in the Kurgan region on Black-and-White cows. The influence of bentonite additive in the ration of highly productive cows during the period of increasing the milk yield on the composition and technological quality of milk and dairy products has been determined. In general, for the first 100 days of lactation the cows of the experimental group have produced by 191 kg more natural fat milk or 8,4 %, compared to the control group. In terms of 4 % milk from animals of the experimental group has been got by 233 kg or 9,3 % more than of the control group. The yield of milk fat in the experimental group was by 10,44 kg or 12,9 % more than the control group. The difference in milk protein yield for 100 days of lactation was 7,34 kg or 9,8 %. The economic indicators (prime-cost, profitability) of milk production when feeding the mineral additive bentonite to cows have been calculated. With an increase in the total cost of obtaining milk from cows of the experimental group, caused by higher milk yields and the purchase of bentonite, the revenue from the sale of milk from this group was by 7,83 thousand rubles or 8,4 % more. As a result, milk production from animals of the experimental group was by 3,44 % more efficient. It has been found that the inclusion of bentonite in the composition of concentrated feed in the amount of 400 g/head/day allowed to reduce their expenditure, as well as EFU and digestible protein, which ultimately provided a higher level of profitability of milk production.

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