In each plot, three samples for soil apparent density
were cored with a cylinder then dried and weighed.
was established by the quotient of the mass and volume of each briquette.
The Cell Size, Apparent Density
, Cell Density, and Nucleation Density
The constituents and procedure used to produce rigid PU foams containing polyols derived from recyclable resources have been described in detail in  for the specific case of foams of 200 kg/[m.sup.3] apparent density
. Below, we briefly recapitulate the formulation of the foams and the method used for obtaining foams of different densities.
Caption: FIGURE 1: Obtaining apparent density
profile of particleboards by X-ray microdensitometry.
of Patala formation coal salt range (g/mL) Sample No.
The pellets, also known as green ceramic pellets, must have at least 50% of relative apparent density
in order to attain final densities in the sintered ceramics that are high enough to be useful (usually higher than 90%).
[[rho].sub.A] was determined by water displacement method as reported in Dutta et al.
The determination of the apparent density
of the aerogels obtained by freeze-drying and cellulose (as received) was performed by an adaptation of ASTM D3575-14 standards, by measuring the volume and the mass of the obtained aerogels, according to (1).
The aim of this work is to record the combined effect of some significant synthesis parameters such as the Si foaming agent content (% w/w fly ash based), the alkali type (R : Na or K), and the alkalinity (R/Al molar ratio) of the activation solution on the compressive strength, the apparent density
, and the porosity development of the foamed fly ash-based geopolymers.
was also measured for the same pastes tested in three-point bending; results are presented in Figure 10.