Analysis of the Effect of Nano-SiO2 and Waterproofing Agent on the Water Transportation Process in Mortar Using NMR

Meng, Tao; Wei, Huadong; Ying, Kanjun; Wang, Menghua

doi:10.3390/app10217867

Cited by 5 publications

(4 citation statements)

References 40 publications

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“…According to the pore distributions of the two materials, the specimens without nano-silica precursor solutions range between 2 μm and 6 μm, while those of specimens with nano-silica precursor solutions are mainly in the range of 1 μm to 3 μm [ 8 , 36 ]. Therefore, the stable nano-silica precursor solution can positively promote cement hydration to generate more gels, which makes pores among cement particles smaller and denser [ 4 , 37 ].…”

Section: Test Results and Analysismentioning

confidence: 99%

“…Improving the performance of cement-based concrete materials has garnered significant research interest from the scientific community in recent years [ 1 , 2 ]. Interestingly, the modification of cement-based concretes by using nanophase materials is regarded as one of the hottest topics [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. NS is the largest-scale nanomaterial in industrial production at present, which can quickly react with calcium hydroxides in cement-based materials to produce calcium silicate hydrate (C-S-H), promote the hydration reaction of cementing materials [ 10 ], and make the micro-structure of materials more compact [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

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The Stabilization Mechanism of Nano-SiO2 Precursor Solution

Jie

et al. 2022

Materials

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The issues associated with the fabrication of nano-silica (NS) mineral powder, such as high cost and agglomeration, can be effectively mitigated by using a precursor solution of NS as the external mixture of cement-based materials. Based on the liquid-phase preparation of NS mineral powder, its preparation technology was thoroughly investigated herein. The precursor solution of NS was synthesized using acid media (HCL, HNO3, HBO3, HCOOH, CH3COOH)—the acetic acid concentration was 1%~15%—and siliceous materials. (The concentration of sodium silicate was 20%~38%.) In addition, the pH value (pH4~pH8) of the precursor solution was measured using a pH detector. The indexes of NS, such as precipitation time, morphology, and distribution, were observed to formulate a preparation technique for the precursor solution of NS that possessed the best results for the precipitation of nanoparticles. From the acquired results, it was demonstrated that acetic acid solution (concentration ≤ 3%) and sodium silicate solution (concentration ≤ 25%) were mixed into a solution with pH = 6, which was the optimum mixing ratio for the precursor solution of NS. The prepared precursor solution of NS was also added to the Ca(OH)2 saturated solution, and the precursor solution became active from a stable state. Then, NS particles were precipitated in an alkaline solution and reacted with Ca(OH)2 to form calcium silicate gel, which made the solution increasingly turbid and generated many visible and uniformed flocculating substances. With time, gels were continuously produced, which then turn white. Similarly, NS particles can be precipitated when the precursor solution is added to cement paste, which reacts with the Ca(OH)2 to generate CSH gel and improve the compactness of the cement paste.

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Section: Test Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Stabilization Mechanism of Nano-SiO2 Precursor Solution

Jie

et al. 2022

Materials

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“…e cure is followed by a drying period in ambient air, approximately 29 o C for 168 hours. A device for measuring the percolating porosity (n) of the blocs has been manufactured following the principle diagram of Figure 4 [6,[18][19][20]]. e porosity is then determined by using the following equation:…”

Section: Composite Formulation and Manufacturingmentioning

confidence: 99%

A Simple Benchmark to Evaluate the Influence Parameters of the Microstructure of the Masonry Wall on Capillary Water Migration Dynamic

Ngnihamye

Kenmogné

Abanda

et al. 2022

Advances in Civil Engineering

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The effects of masonry wall parameters on the water’s migration are deeply explored via the experimental laboratory simulation method. At this end, an experimental device consisting of a water tank in which a masonry block wall has a contact of around one centimeter with the water at its base is designed. The variation of the compactness of masonry blocks is obtained by compacting the concrete blocks with a hydraulic block press. The investigations consist of the monitoring of moisture front and moisture rate as a function of porosity, obtained by varying the compactness of the masonry wall, and the granular class of sand constituting the masonry. The determination of the granular sand classes was made from the NF P 18-101 standard. Three granular classes of sand were obtained using sand from the Logbadjeck quarry: 0/0.315 mm, 0.63/1.25 mm, and 2.5/5 mm. The obtained results show that the device is a good tool for the experimental analysis of the behavior of different masonry walls under water migration, which are in agreement with existing models in the literature.

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“…The life of concrete can be durable because the addition of waterproofing materials reduces water absorption and permeability through the concrete capillaries. [3,7,8]. Standard concrete has a compressive strength that is more significant than the required waterproofing concrete.…”

Section: Introductionmentioning

confidence: 99%

Integral waterproofing concrete mechanical properties with the addition of fly ash

Nurtanto,

Roziqin,

Krisnamurti

et al. 2023

Res. Eng. Struct. Mater.

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DisclaimerAll the opinions and statements expressed in the papers are on the responsibility of author(s) and are not to be regarded as those of the journal of Research on Engineering Structures and Materials (RESM) organization or related parties. The publishers make no warranty, explicit or implied, or make any representation with respect to the contents of any article will be complete or accurate or up to date. The accuracy of any instructions, equations, or other information should be independently verified. The publisher and related parties shall not be liable for any loss, actions, claims, proceedings, demand or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with use of the information given in the journal or related means.Published articles are freely available to users under the terms of Creative Commons Attribution -NonCommercial 4.0 International Public License, as currently displayed at here (the "CC BY -NC").

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Analysis of the Effect of Nano-SiO2 and Waterproofing Agent on the Water Transportation Process in Mortar Using NMR

Cited by 5 publications

References 40 publications

The Stabilization Mechanism of Nano-SiO2 Precursor Solution

The Stabilization Mechanism of Nano-SiO2 Precursor Solution

A Simple Benchmark to Evaluate the Influence Parameters of the Microstructure of the Masonry Wall on Capillary Water Migration Dynamic

Integral waterproofing concrete mechanical properties with the addition of fly ash

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