Mortar and paste

The specimens were cast with concretes made with three kinds of coarse aggregate crushed basalt, river gravel and crushed limestone. Other specimens were prepared with cement mortar and paste. The specimens were subjected to shearing as shown in Figure 10.38. 

The differences in fractal dimensions for concrete, mortar and paste specimens may be explained by the influence of the smallest grains of sand and cement which have completely different roles in these composite materials. 

Abdelrazig and co-workers studied the hydration (at 22°C) of MgO (75 g) and monoammonium phosphate (56 g) a composition ratio not dissimilar to commercial phosphate cements.P Mortars (Systems 1 and 2) and pastes (System 4) were investigated. The mortars (containing quartz sand) were prepared at water/solid ratios of 0.62 and 0.125 the pastes had water/solid ratios of 0.125. Thermograms (DTA) of mortar and paste are shown in Fig. 28a. The hydration time is one week. 

Improved pumpability of concrete, machine grouts, and spray plasters Improved workability of trowel-applied mortars and pastes... 

Lyse by mechanical grinding using a porcelain mortar and pestle. Add further LN2 as necessary during the grinding, until a fine, whitish powder is formed. The LN2 must not be allowed to evaporate completely or the cells will start to thaw and form an unmanageable paste. 

Procedure Take about 15-20 mg of sample in a previously cleaned small agate mortar and powder it thoroughly (about 200 mesh). Add to it 2 drops of purified paraffin (commonly known as Nujol) or any other suitable mulling liquid and continue the trituration until a very smooth paste of uniform consistency is achieved. Now, transfer the slurry to a sodium chloride window, placing it carefully into the cavity made by the spacer. Consequently, place the other window on top and thus assemble the cell. With the help of a clean piece of tissue-paper wipe out the excess paste that has squeezed out from the cell windows. Finally, introduce the cell in the respective cell-compartment. 

If the product solidifies in lumps, these must be removed, crushed to a paste in a large mortar and returned to the mixture for stirring. 

Extract fresh food samples whenever possible. Grind solid and/or dehydrated soybean products in a grinder or with a mortar and pestle until a fine powder (one that can pass through a 50-mesh screen) is obtained. Mash moist soybean product to a fine paste. 

Create a pallet of natural paints. Find colored rocks. Black coal also works. Identify their chemical composition. Grind each rock using a mortar and pestle. Add a binder to the powdered rock. Binders can be glue, starch paste, or egg yolk. Now you have paints. Use these paints in a drawing. Try to identify an element or a combination of elements that produces certain colors. 

The organic materials were mixed thoroughly in a mortar, and ammonium carbonate was added and ground with a pestle into a smooth paste. Finally, the citric acid was dissolved in the water and stirred into... 

Solution. (i) Grind a few blocks of litmus, with a little water, in a mortar, and add the paste to enough water to produce the desired color. 

In order to fit a shell with this star, place it on the shoulder of the shell and paste down the ernarginated edge. Secure it by pasting pieces of kraft paper around the base of the star. The position of the star must be near the hanger so that the shell is not caught by the inside wall of the mortar when loading or firing(Fig.Il8(2)). 

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