Effects of South African Silica Sand Properties on the Strength Development and Collapsibility of Single Component Sodium Silicate Binders

Banganayi, Farai; Nyembwe, Kasongo; Polzin, Hartmut

doi:10.1515/afe-2017-0081

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…The operational properties of silicatebased compositions are retained for a long period (more than one year), while the serviceable life of most resins does not exceed 3-6 months. Silicate-based solutions have high binding properties, stickability and increased adhesion to quartz sand [9].…”

Section: Introductionmentioning

confidence: 99%

Development of composition of cementing slurry for fastening of low-cemented rocks

Kondrat¹,

Dremliukh²,

Khaidarova³

2021

Min. miner. depos.

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Purpose. Improving the producing capacity and ensuring the stable operation of gas wells that develop unstable, low-cemented reservoirs by preventing the sand entry from the reservoir by means of creating the cement stone with the corresponding values of strength and permeability in the bottomhole formation zone. Methods. The technological characteristics of the cementing slurry and the formed cement stone are measured using standard recording equipment. The cementing slurry consistency is measured with a pycnometer, the cement mixture spread ability – using AzNII cone, water separation is measured according to standard methods (DSTU BV.2.7 – 86-99), and the time of the cementing slurry hardening is determined on a consistometer KTS-3. The ultimate parameters of the stone strength during bending are determined on a special device for testing linear objects in tension, and compression – on a PSU-10 hydraulic press. Findings. The cementing slurry composition for creating the cement stone with the corresponding values of compression strength and gas permeability in the bottomhole formation zone has been developed, which includes oilwell cement, expanded perlite, non-ionic surfactant, plasticizer and water. Dependences of the cement stone compression strength and the stone permeability coefficient on the proportion of expanded perlite in the cementing slurry solution have been revealed. It is recommended to use the proposed cementing slurry for creating a cement stone with specified values of compression strength and permeability in the expanded well shaft in the interval of the producing reservoir. Originality. The optimal proportion of the expanded perlite in the solution has been found, at which the corresponding values of the compression strength (up to 4 MPa) and gas permeability (up to 3.47 μm2) of the cement stone is provided. Practical implications. When using the developed composition, it is possible to increase the yield of wells with unstable reservoirs and improve their working conditions by preventing the sand entry from the reservoir into the well.

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Section: Introductionmentioning

confidence: 99%

Development of composition of cementing slurry for fastening of low-cemented rocks

Kondrat¹,

Dremliukh²,

Khaidarova³

2021

Min. miner. depos.

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“…The two-component systems were successfully implemented in the large-scale production of aluminum engine heads and blocks. The additives in the powder component optimize the sand mixture flowability, hardening rate, core strengths, cores storage, and thermal stability, and prevent the casting surface from burning on [7,8]. The main aspect of this paper was the analysis of how properties of one basic coarse sand can be influenced and changed by the addition of a fine sand (AFS).…”

Section: Introductionmentioning

confidence: 99%

Examination of Behavior from Selected Foundry Sands with Alkali Silicate-Based Inorganic Binders

Vasková

Varga

Prass³

et al. 2020

Metals

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The automotive industry is one of the most important customers for the foundry industry. In particular, casting of engine parts for combustion engines is one of the most demanding areas of casting technology. New generation of engine blocks and cylinder heads are getting geometrically more complicated in order to maintain or even increase performance. With the increased complexity, the strain for the casting molds is growing and the widely used technology of core making with standard silica sands is, for several applications, no longer reaching the demanded results. Furthermore, in last decade, there has been an effort in using inorganic binders in core making process, which brings along some additional technological challenges. In order to cope with these challenges, in this paper, silica and non-silica sands with round and angular grains as well as with fine and coarse grains are examined using an inorganic binder for strength, permeability, and thermal stability. The results shall provide useful information about the possibilities of application and combining different types of foundry sands, both silica and non-silica. With their impact on the selected sand core properties, they can help in solving problems in the core making process as well as reaching a high quality of the final product-casting.

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Effects of South African Silica Sand Properties on the Strength Development and Collapsibility of Single Component Sodium Silicate Binders

Cited by 2 publications

References 2 publications

Development of composition of cementing slurry for fastening of low-cemented rocks

Development of composition of cementing slurry for fastening of low-cemented rocks

Examination of Behavior from Selected Foundry Sands with Alkali Silicate-Based Inorganic Binders

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